An article Tetrabutylammonium-Bromide-Promoted Synthesis of Spirooxindoles through Alkyne-Aldehyde C-C Coupling and 1,3-Dipolar Cycloaddition Using Ytterbium Triflate Catalyst WOS:000542426900029 published article about HECK REACTION; AZOMETHINE YLIDES; AMINO-ACIDS; DERIVATIVES; SPIROPYRROLIZIDINES; HETEROCYCLES; CHEMISTRY; PALLADIUM; PROTOCOL; KETONES in [Teja, Chitrala; Khan, Fazlur Rahman Nawaz] Vellore Inst Technol, Sch Adv Sci, Organ & Med Chem Res Lab, Vellore 632014, Tamil Nadu, India in 2020.0, Cited 37.0. The Name is 2,5-Dimethoxybenzaldehyde. Through research, I have a further understanding and discovery of 93-02-7. Recommanded Product: 93-02-7
Tetrabutylammonium-bromide promoted, ytterbium triflate catalyzed one-pot domino synthesis of spirooxindoles is described. The hydration-condensation of alkyne,1aldehyde,2C-C coupling followed by 1,3-dipolar cycloaddition of in-situ generated azomethine ylide from Isatin,3and L-proline,4 aor sarcosine,4 bfurnished novel spirooxindoles,5under solvent-free green-chemical conditions, in high regio and stereo selectivities and yields. The regio and stereochemistry of the synthesized derivatives were characterized by 2D NMR Spectroscopic studies.
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Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com