Ti-direct, powerful, stereoselective aldol-type additions of esters and thioesters to carbonyl compounds: application to the synthesis and evaluation of lactone analogs of jasmone perfumes
thiophenyl esters or thioaryl esters with aldehydes and ketones was performed (total 46 examples). The present method is advantageous from atom-economical and cost-effective viewpoints; good to excellent yields, moderate to good syn-selectivity, substrate variations, reagent availability, and simple procedures. Utilizing the present reaction as the key step, an efficient short synthesis of three lactone
Preparation of 1-phenylsulphonyl-1-phenylthio epoxide: Convenientprecursors to α-halo S-phenyl thio esters
作者:Cheryl T. Hewkin、Richard F.W. Jackson、William Clegg
DOI:10.1016/s0040-4039(00)80635-8
日期:1988.1
1-Phenylsulphonyl-1-phenylthio epoxides (3), readily prepared from aldehydes, react with lithium or magnesium halides to give high yields of the corresponding α-halo S-phenylthioesters.