THIOALKYLATION OF ENOLATES .3. STEREOSELECTIVE SYNTHESIS OF STEROIDS AND RELATED-COMPOUNDS .2. ALPHA-THIOALKYLATION OF ZINC DIENOLATES TO 4-SUBSTITUTED 1-TERT-BUTOXY-7A-METHYL-HEXAHYDROINDEN-5-ONES
U. Groth et al., THIOALKYLATION OF ENOLATES .3. STEREOSELECTIVE SYNTHESIS OF STEROIDS AND RELATED-COMPOUNDS .2. ALPHA-THIOALKYLATION OF ZINC DIENOLATES TO 4-SUBSTITUTED 1-TERT-BUTOXY-7A-METHYL-HEXAHYDROINDEN-5-ONES, Liebigs Annalen der Chemie, (7), 1994, pp. 665-668
Alpha-alkylation of the alpha,beta-unsaturated ketone 1 at C-4 has bee
n achieved by thioalkylation of the corresponding zinc dienolate with
alpha-chlorosulfides of type 2. The desulfurization of the beta-(pheny
lthio) ketones 4 leads directly to the 4-substituted hexahydroinden-5-
ones 5.