作者:N. A. Keiko、E. A. Funtikova、L. G. Stepanova、Yu. A. Chuvashev、L. I. Larina
DOI:10.1023/a:1020893310626
日期:——
Addition of thiols to 2-alkoxypropenal in neutral medium at 20degreesC in the absence of a catalyst occurs regioselectively, following the Markownikoff pattern. The resulting 2-alkoxy-2-R-thiopropanals are capable of undergoing spontaneous isomerization to 1-alkoxy-1-R-thiopropanones. The addition and isomerization processes are accelerated by heating to 60degreesC or in the presence of acid catalysts (TsOH, HCl). The reaction is also accompanied by partial disproportionation of 2-oxopropanal O,S-acetals to give O,O- and S,S-acetals.