
Chemistry Letters p. 1535 - 1538 (1981)
Update date:2022-08-04
Topics:
Toda, Takashi
Tokida, Akihiko
Mukai, Toshio
Suzuki, Yoshizo
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 (4) by base treatment are also reported.
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