Day: October 13, 2021

Authors Kim, HT; Kang, E; Kim, M; Joo, JM in AMER CHEMICAL SOC published article about DEHYDROGENATIVE HECK REACTION; ARYLBORONIC ACID; CHELATING LIGANDS; INTERNAL ALKYNES; SOLVENT CONTROL; FUNCTIONALIZATION; COMPLEXES; OLEFINATION; ACTIVATION; 2-(1H-PYRAZOL-1-YL)PYRIDINE in [Kim, Hyun Tae; Kang, Eunsu; Kim, Minkyu; Joo, Jung Min] Pusan Natl Univ, Dept Chem & Chem, Inst Funct Mat, Busan 46241, South Korea in 2021, Cited 53. Formula: C8H10O2. The Name is 1,3-Dimethoxybenzene. Through research, I have a further understanding and discovery of 151-10-0

A new class of bidentate ligands was prepared by a modular approach involving Rh-catalyzed C-H annulation reactions. The resulting conformationally constrained ligands enabled the Pd-catalyzed C-H alkenylation at electron-rich and sterically less hindered positions of electron-rich arenes while promoting the facile oxidation of Pd(0) intermediates by oxygen. This newly introduced ligand class is complementary to the ligands developed for Pd-catalyzed oxidative reactions and may find broad application in transition-metal-catalyzed reactions.

About 1,3-Dimethoxybenzene, If you have any questions, you can contact Kim, HT; Kang, E; Kim, M; Joo, JM or concate me.. Formula: C8H10O2

Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com

In 2020 ACS SUSTAIN CHEM ENG published article about CHEMISTRY RESEARCH AREAS; SOLVENT-FREE SYNTHESIS; BOND FORMATION; PEPTIDE; PERSPECTIVE; EFFICIENT; DIPEPTIDES; MECHANISM; COMU; MECHANOSYNTHESIS in [Dalidovich, Tatsiana; Mishra, Kamini A.; Shalima, Tatsiana; Kudrjasova, Marina; Kananovich, Dzmitry G.; Aav, Riina] Tallinn Univ Technol, Sch Sci, Dept Chem & Biotechnol, EE-12618 Tallinn, Estonia in 2020, Cited 85. The Name is 2,6-Difluorobenzoic acid. Through research, I have a further understanding and discovery of 385-00-2. HPLC of Formula: C7H4F2O2

Solvent-free, atom-efficient, and mechanochemically activated reactions have emerged as synthetic strategy for sustainable chemistry. Herein we report a new mechanochemical approach for the amide coupling of carboxylic acids and amines, mediated by combination of (1-cyano-2-ethoxy-2-oxoethylidenaminooxy)-dimethylaminomorpholinocarbenium hexafluorophosphate (COMU) or N,N,N’,N’-tetramethylchloroformamidinium hexa-fluorophosphate (TCFH) and K2HPO4. The method delivers a range of amides in high yields (70-96%) and fast reaction rates. The reaction protocol is mild, keeps stereochemical integrity of the adjacent to carbonyl stereocenters, and streamlines isolation procedure for solid amide products. Minimal waste is generated due to the absence of bulk solvent. We show that K2HPO4 plays a dual role, acting as a base and a precursor of reactive acyl phosphate species. Amide bonds from hindered carboxylic acids and low-nucleophilic amines can be assembled within 90 minutes by using TCFH in combination with K2HPO4 or N-methylimidazole. The developed mechanochemical liquid-assisted amidation protocols were successfully applied to the challenging couplings of all six carboxylate functions of biotin[6]uril macrocycle with phenylalanine methyl ester, resulting in 80% yield of highly pure hexa-amide-biotin[6]uril. In addition, fast and high-yielding synthesis of peptides and versatile amide compounds can be performed in a safe and environmentally benign manner, as verified by green metrics.

HPLC of Formula: C7H4F2O2. About 2,6-Difluorobenzoic acid, If you have any questions, you can contact Dalidovich, T; Mishra, KA; Shalima, T; Kudrjasova, M; Kananovich, DG; Aav, R or concate me.

Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com

Category: isothiazole. In 2020 J AGR FOOD CHEM published article about CUL3-BASED E3 LIGASE; OXIDATIVE STRESS; THERAPEUTIC TARGET; PC12 CELLS; NEURODEGENERATIVE DISEASES; MITOCHONDRIAL DYSFUNCTION; KEAP1-NRF2-ARE PATHWAY; BIOLOGICAL EVALUATION; HYDROGEN-PEROXIDE; CANCER PREVENTION in [Song, Zi-Long; Bai, Feifei; Zhang, Baoxin; Fang, Jianguo] Lanzhou Univ, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China; [Song, Zi-Long; Bai, Feifei; Zhang, Baoxin; Fang, Jianguo] Lanzhou Univ, Coll Chem & Chem Engn, Lanzhou 730000, Peoples R China in 2020, Cited 70. The Name is 3-Methylbenzoic acid. Through research, I have a further understanding and discovery of 99-04-7.

Oxidative stress is implicated in the pathogenesis of a wide variety of neurodegenerative disorders, and accordingly, dietary supplement of exogenous antioxidants or/and upregulation of the endogenous antioxidant defense system are promising for therapeutic intervention or chemoprevention of neurodegenerative diseases. Nrf2, a master regulator of the cellular antioxidant machinery, cardinally participates in the transcription of cytoprotective genes against oxidative/electrophilic stresses. Herein, we report the synthesis of 59 structurally diverse dithiolethiones and evaluation of their neuroprotection against 6-hydroxydopamine- or H2O2 -induced oxidative damages in PC12 cells, a neuron-like rat pheochromocytoma cell line. Initial screening identified compounds 10 and 11 having low cytotoxicity but conferring remarkable protection on PC12 cells from oxidative-mediated damages. Further studies demonstrated that both compounds upregulated a battery of antioxidant genes as well as corresponding genes’ products. Significantly, silence of Nrf2 expression abolishes cytoprotection of 10 and 11, indicating targeting Nrf2 activation is pivotal for their cellular functions. Taken together, the two lead compounds discovered here with potent neuroprotective functions against oxidative stress via Nrf2 activation merit further development as therapeutic or chemopreventive candidates for neurodegenerative disorders.

Category: isothiazole. About 3-Methylbenzoic acid, If you have any questions, you can contact Song, ZL; Bai, FF; Zhang, BX; Fang, JG or concate me.

Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com

Computed Properties of C14H10O3. In 2020 ACS CENTRAL SCI published article about ASYMMETRIC PHOSPHORYLATION; SELECTIVE PHOSPHORYLATION; OLIGONUCLEOTIDE SYNTHESIS; PHOSPHORIC-ACID; FUNCTIONALIZATION; PHOSPHOPEPTIDES; PENTAPHOSPHATES; CONDENSATION; EXPLORATION; CONVERSION in [Domon, K.; Fujiyoshi, K.; Kawashima, S. A.; Yamatsugu, K.; Kanai, M.] Univ Tokyo, Grad Sch Pharmaceut Sci, Tokyo 1130033, Japan; [Puripat, M.; Hatanaka, M.] Nara Inst Sci & Technol NAIST, Inst Res Initiatives, Div Res Strategy, Ikoma 6300192, Japan; [Hatanaka, M.] NAIST, Grad Sch Sci & Technol, Data Sci Ctr, Ikoma 6300192, Japan in 2020, Cited 41. The Name is Benzoic anhydride. Through research, I have a further understanding and discovery of 93-97-0.

Phosphorylation of alcohols is a fundamentally important reaction in both life science and physical science. Product phosphate monoesters play key roles in living organisms, natural products, pharmaceuticals, and organic materials. Most of the chemical methods to date for synthesizing phosphate monoesters, however, require multistep sequences or are limited to specific types of substrates possibly due to harsh conditions. An alternative way to enable the simple production of phosphate monoesters from highly functionalized precursor alcohols is, thus, highly desired. We report herein a catalytic phosphorylation of alcohols with high functional group tolerance using tetrabutylammonium hydrogen sulfate (TBAHS) and phosphoenolpyruvic acid monopotassium salt (PEP-K) as the catalyst and phosphoryl donor, respectively. This method enables the direct introduction of a nonprotected phosphate group to the hydroxy group of a diverse menu of alcohol substrates, including functionalized small molecules, carbohydrates, and unprotected peptides. Nuclear magnetic resonance, mass spectrometric, and density functional theory analyses suggest that an unprecedented mixed anhydride species, generated from PEP-K and TBAHS, acts as an active phosphoryl donor in this reaction. This operationally simple and chemoselective catalytic phosphorylation allows for the efficient production of densely functionalized O-phosphorylated compounds, which are useful in diverse fields including biology and medicine.

Computed Properties of C14H10O3. About Benzoic anhydride, If you have any questions, you can contact Domon, K; Puripat, M; Fujiyoshi, K; Hatanaka, M; Kawashima, SA; Yamatsugu, K; Kanai, M or concate me.

Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com

Name: 1,3-Dimethoxybenzene. I found the field of Chemistry very interesting. Saw the article Regioselective C-H Thioarylation of Electron-Rich Arenes by Iron(III) Triflimide Catalysis published in 2021, Reprint Addresses Sutherland, A (corresponding author), Univ Glasgow, Sch Chem, WestCHEM, Joseph Black Bldg, Glasgow G12 8QQ, Lanark, Scotland.. The CAS is 151-10-0. Through research, I have a further understanding and discovery of 1,3-Dimethoxybenzene.

A mild and regioselective method for the preparation of unsymmetrical biaryl sulfides using iron(III) catalysis is described. Activation of N-(arylthio)succinimides using the powerful Lewis acid iron(III) triflimide allowed the efficient thiolation of a range of arenes, including anisoles, phenols, acetanilides, and N-heterocycles. The method was applicable for the late-stage thiolation of tyrosine and tryptophan derivatives and was used as the key step for the synthesis of pharmaceutically relevant biaryl sulfur-containing compounds such as the antibiotic dapsone and the antidepressant vortioxetine. Kinetic studies revealed that while N-(arylthio)succinimides lbearing electron-deficient arenes underwent thioarylation catalyzed entirely by iron(III) triflimide, N-(arylthio)succinimides with electron-rich arenes displayed an autocatalytic mechanism promoted by the Lewis basic product.

Name: 1,3-Dimethoxybenzene. About 1,3-Dimethoxybenzene, If you have any questions, you can contact Dodds, AC; Sutherland, A or concate me.

Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com

An article New Seco-DSP derivatives as potent chemosensitizers WOS:000573916100010 published article about MULTIDRUG-RESISTANCE; P-GLYCOPROTEIN; CANCER; REVERSAL; MODULATORS; MECHANISMS; AGENTS; CELLS in [Wan, Qi; Guo, Yalan; Yu, Zhihui; Guo, Shiqi; Chen, Ying] Fudan Univ, Sch Pharm, Dept Med Chem, Shanghai, Peoples R China; [Jin, Xin; Liu, Hongrui] Fudan Univ, Sch Pharm, Dept Pharmacol & Biochem, Shanghai, Peoples R China; [Morris-Natschke, Susan; Lee, Kuo-Hsiung] Univ N Carolina, UNC Eshelman Sch Pharm, Nat Prod Res Labs, Chapel Hill, NC 27599 USA; [Lee, Kuo-Hsiung] China Med Univ & Hosp, Chinese Med Res & Dev Ctr, Taichung 40402, Taiwan in 2020, Cited 21. Recommanded Product: 385-00-2. The Name is 2,6-Difluorobenzoic acid. Through research, I have a further understanding and discovery of 385-00-2

Thirty-four seco-3’R,4’R-disubstituted-2′,2′-dimethyldihydropyrano[2,3-f]chromone (seco-DSP) derivatives were designed, synthesized and evaluated for chemo-reversal activity when combined with paclitaxel or vincristine in P-gp overexpressing A2780/T and KB-VIN drug-resistant cancer cell lines. Most of the compounds displayed moderate to significant MDR reversal activities. Compound 7e showed the most potent chemo-sensitization activity with more than 1471 reversal ratio at a concentration of 10 mu M, which was higher than verapamil (VRP) (212-fold). Unexpectedly the newly synthesized compounds did not show chemosensitization activities in a non-P-gp overexpressing cisplatin resistant human ovarian cancer cell line (A2780/CDDP), implying that the MDR reversal effects might be associated with P-gp overexpression. Moreover, the compounds did not exhibit significant anti-proliferative activities against non-tumorigenic cell lines (HUVEC, HOSEC and T29) compared to VRP at the tested concentration and might be safer than VRP. In preliminary pharmacological mechanism studies, the compounds increased accumulation of DOX and promoted P-gp ATPase activity in A2780/T cell lines. Western blot analysis indicated they did not affect the expression level of P-gp in the tested MDR cell lines. Thus, further studies on these seco-DSP derivatives are merited with the goal of developing a desirable chemosensitizer drug candidate. (C) 2020 Elsevier Masson SAS. All rights reserved.

Recommanded Product: 385-00-2. About 2,6-Difluorobenzoic acid, If you have any questions, you can contact Wan, Q; Jin, X; Guo, YL; Yu, ZH; Guo, SQ; Morris-Natschke, S; Lee, KH; Liu, HR; Chen, Y or concate me.

Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com

Recently I am researching about ONE-POT PROTECTION; STEREOSELECTIVE-SYNTHESIS; REGIOSELECTIVE ACETYLATION; ACETAL-GLYCOSIDES; ALPHA-GLUCOSIDES; HYDROXYL-GROUPS; GLYCOSYLATION; DERIVATIVES; ACYLATION; CATALYSIS, Saw an article supported by the Academia SinicaAcademia Sinica – Taiwan [MOST 108-3114-Y-001002, AS-SUMMIT-109]; Ministry of Science and Technology [MOST 108-2113-M-001-019-, MOST 109-2113M-001-005-]. Category: isothiazole. Published in AMER CHEMICAL SOC in WASHINGTON ,Authors: Weldu, WD; Wang, CC. The CAS is 93-97-0. Through research, I have a further understanding and discovery of Benzoic anhydride

Selective modification of the hydroxyl groups of sugars has been a long-standing challenge due to their proximate relative reactivity. Herein, we report a TMSOTf-catalyzed selective acetylation of the non-anomeric hydroxyl groups of several per-O-TMS-protected sugar substrates while leaving their anomeric group unaffected. In addition to standing versatile by itself, the anomeric O-TMS group left intact can be functionalized to afford key sugar precursors such as imidate donors, which could otherwise be synthesized via a stepwise anomeric deprotection-functionalization procedure.

About Benzoic anhydride, If you have any questions, you can contact Weldu, WD; Wang, CC or concate me.. Category: isothiazole

Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com

Recommanded Product: Benzoic anhydride. Zhang, LH; Zhang, ZH; Li, MY; Wei, ZY; Jin, XJ; Piao, HR in [Zhang, Lin-Hao; Zhang, Zhi-Hong; Li, Ming-Yue; Jin, Xue-Jun; Piao, Hu-Ri] Yanbian Univ, Key Lab Nat Resources Changbai Mt & Funct Mol, Minist Educ, Coll Pharm, Yanji 133002, Peoples R China; [Wei, Zhi-Yu] Dalian Univ, Coll Med, Dalian 116622, Liaoning, Peoples R China published Synthesis and evaluation of the HIF-1 alpha inhibitory activities of novel ursolic acid tetrazole derivatives in 2019, Cited 37. The Name is Benzoic anhydride. Through research, I have a further understanding and discovery of 93-97-0.

The hypoxia-inducible factor-la (HIF-1 alpha) pathway has been implicated in tumor angiogenesis, growth, and metastasis. Therefore, the inhibition of this pathway is an important therapeutic target for the treatment of various types of cancers. Here, we designed and synthesized 31 ursolic acid (UA) derivatives containing a tetrazole moiety and evaluated them for their potential anti-tumor activities as HIF-la transcriptional inhibitors. Of these, compound 14d (IC50 0.8 +/- 0.2 mu M) displayed the most potent activity and compounds 14a (IC50 4.7 +/- 0.2 mu M) exhibited the most promising biological profile. Analysis of the structure-activity relationships of these compounds with HIF-1 alpha suggested that the presence of a tetrazole group located at C-28 of the UA derivatives was critical for their inhibitory activities.

Recommanded Product: Benzoic anhydride. About Benzoic anhydride, If you have any questions, you can contact Zhang, LH; Zhang, ZH; Li, MY; Wei, ZY; Jin, XJ; Piao, HR or concate me.

Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com

Recently I am researching about CROSS-COUPLING REACTIONS; HIGHLY-ACTIVE CATALYST; EFFICIENT SYNTHESIS; PHOSPHINE; TRANSMETALATION; COMPLEXES; AMINATION; SCOPE, Saw an article supported by the VinnovaVinnova [INNOV 2015/29]; [2016-02110]. Published in WILEY-V C H VERLAG GMBH in WEINHEIM ,Authors: Byrne, L; Skold, C; Norrby, PO; Munday, RH; Turner, AR; Smith, PD. The CAS is 151-10-0. Through research, I have a further understanding and discovery of 1,3-Dimethoxybenzene. SDS of cas: 151-10-0

Here we describe the development of biaryl 2,5-diphenylphospholanes as a new class of C-2-symmetric, monodentate ligands for asymmetric Suzuki-Miyaura (ASM) reactions. Screening of a series of exemplary phospholanes led to the identification of two ligands that were used to prepare a range of atropisomeric biaryl and heterobiaryl products with good to excellent levels of enantioselectivity (up to 97:3 e.r.) under mild conditions. DFT studies suggest that the formation of a constraining ligand pocket and coordination of one of the biaryl methoxy groups in the optimised ligands to the metal centre is crucial for restricting conformational freedom in the bond-forming step.

SDS of cas: 151-10-0. About 1,3-Dimethoxybenzene, If you have any questions, you can contact Byrne, L; Skold, C; Norrby, PO; Munday, RH; Turner, AR; Smith, PD or concate me.

Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com

An article Controlling reactivity in the Fujiwara-Moritani reaction: Examining solvent effects and the addition of 1,3-dicarbonyl ligands on the oxidative coupling of electron rich arenes and acrylates WOS:000512482000005 published article about C-H OLEFINATION; BOND ACTIVATION; CATALYZED OLEFINATION; AROMATIC-SUBSTITUTION; MIZOROKI-HECK; PD; ARYLATION; ALKENYLATION; DERIVATIVES; ETHYLENE in [Jones, Roderick C.] Univ Coll Dublin, Sch Chem & Bioproc Engn, Dublin 4, Ireland in 2020, Cited 73. The Name is 1,3-Dimethoxybenzene. Through research, I have a further understanding and discovery of 151-10-0. Quality Control of 1,3-Dimethoxybenzene

A palladium-catalysed direct alkenation of electron rich arenes in the presence of K2S2O8 with an acetic acid/1,4-dioxane solvent combination has been developed. The 1,4-dioxane co-solvent dramatically influences the rate of reaction, giving selectively disubstituted alkenes, while the addition of acetylacetone ligands was shown to increase site selectivity for the alkenation of monofunctionalized arenes. The participation of these carbonyl ligands has been confirmed by ESI-MS studies, with some key in situ intermediates in the catalytic cycle identified. A variety of electron rich arenes and olefinic substrates can be utilised in the direct oxidative coupling to give disubstituted alkenes in moderate to good yields. (C) 2019 Elsevier Ltd. All rights reserved.

Quality Control of 1,3-Dimethoxybenzene. About 1,3-Dimethoxybenzene, If you have any questions, you can contact Jones, RC or concate me.

Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com