A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 1235-74-1, Name is (1R,4aS,10aR)-methyl 7-isopropyl-1,4a-dimethyl-1,2,3,4,4a,9,10,10a-octahydrophenanthrene-1-carboxylate, molecular formula is C21H30O2. In an article, author is CLERICI, F,once mentioned of 1235-74-1, Category: isothiazole.
ISOTHIAZOLES .5. CYCLOADDITION REACTION OF NITRILE OXIDES TO 3-DIETHYLAMINO-4-(4-METHOXYPHENYL)-ISOTHIAZOLE 1,1-DIOXIDE – AN ENTRY TO 5-ACYL-ISOTHIAZOLE 1,1-DIOXIDE AND 5-CYANO-ISOTHIAZOLE 1,1-DIOXIDE DERIVATIVES
Nitrile oxides 2 reacted with 3-diethylamino-4-(4-methoxyphenyl)-isothiazole 1,1-dioxide (1) affording through a highly regioselective 1,3-dipolar cycloaddition reaction isothiazolo[5,4-d]isoxazoline 4,4-dioxides 3. Reduction of 3 afforded a mixture of the E and Z forms of the corresponding 5-(amino-arylmethylene)-dihydro-isothiazole 1,1-dioxides 4/5 which were transformed into 5-acyl-dihydro-isothiazole 1,1-dioxides 6 and the corresponding dehydrated products 7. Compound 3 f was easily transformed into 5-cyanoisothiazole 1,1-dioxide 11.
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Reference:
Isothiazole – Wikipedia,
,Isothiazole – ScienceDirect.com