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
How to make a carbonylative coupling faster than the easier nucleophilicsubstitution? In this communication, a rhodium-catalyzed radical-based carbonylative coupling of alkyl halides with thiolphenols has been realized. Thioesters were isolated in good yields in general.
Various thioesters were obtained through an efficient phase-transfer catalysis method, by treating several thiophenols with different acyl chlorides, in a biphasic system composed of 10% aqueous NaOH and dichloromethane in the presence of tetrabutylammonium chloride. The thiolation reaction was complete in only 5 minutes, at 0 degrees C.
Synthesis of isothioamides of Alk-C(SAr)=NAr by radical arylation of thioamides
作者:I. O. Bragina、I. I. Kandror
DOI:10.1007/bf00962753
日期:1988.7
BRAGINA, I. O.;KANDROR, I. I., IZV. AN CCCP. CEP. XIM.,(1988) N 7, 1594-1599