Thermolyses of dimethylsulfonium 1-(2,6-diphenyl and 2,3,5,6-tetraphenyl-4H-pyran-4-yl )-2-oxo-2-phenylethylides (1 and 3) caused a novel [1,3] ylide rearrangement to give dimethylsulfonium 1-benzoyl-6-oxo-2,6-diphenyl and 2,3,5,6-tetraphenyl-2,4-hexadienylides (6 and 7), respectively. The formations of oxy-thio-acetal derivatives (11 and 12) of 4-pyranylidene from 3 and its methylphenylsulfonium analogue
二甲基锍 1-(2,6-二苯基和 2,3,5,6-四苯基-
4H-吡喃-4-基)-2-氧代-2-苯基乙基化物 (1 和 3) 的热解引起了一种新的 [1,3 ] 叶立德重排,分别得到二甲基锍 1-苯甲酰基-6-氧代-2,6-二苯基和 2,3,5,6-四苯基-2,4-己二亚基(6 和 7)。还报道了通过碱处理从 3 及其甲基苯基锍类似物 (4) 形成 4-
吡喃基的氧-
硫代-
缩醛衍
生物 (11 和 12)。