Studies in alkylation of 3-methyl-3-sulfolene and thermolysis of resulting 2-alkyl-3-sulfolenes: Convenient synthesis of 1,2-disubstituted-1,3-dienes
作者:Shailesh R Desai、Vinayak K Gore、T Mayelvaganan、R Padmakumar、Sujata V Bhat
DOI:10.1016/s0040-4020(01)89010-4
日期:——
Various 1,2-disubstituted-1,3-dienes have been synthesised through the alkylation of 3-methyl-3-sulfolene (1) followed by thermolysis of the resulting 2-alkyl-3-methyl- 3-sulfolene (3,7). The alkylations with bulky iodides, particularly, containing ethylene ketal or phenyl sulfide moiety yield considerable amounts of rearranged 2-alkyl-3-methyl-2-sulfolene (4). The sulfolenes 3,4 & 7 have been desulfonylated
通过3-甲基-3-环丁砜(1)的烷基化反应,然后热解生成的2-烷基-3-甲基-3-环丁烯(3,7 ),合成了各种1,2-二取代-1,3-二烯)。用大体积碘化物进行的烷基化,特别是含有乙烯缩酮或苯基硫化物的碘化物,可产生大量的重排的2-烷基-3-甲基-2-环丁砜(4)。所述sulfolenes 3,4&7已在温和条件下脱磺酰以产生对应的1,3-二烯。