Bulletin of the Chemical Society of Japan p. 817 - 821 (1981)
Update date:2022-08-05
Topics:
Watanabe, Mikio
Nakamori, Seijin
Hasegawa, Hatsue
Shirai, Kozo
Kumamoto, Takanobu
The Pummerer rearrangement reaction of 2- or 3-substituted 4-(phenylsulfinyl)butyric acids in the presence of an excess amount of acetic anhydride and a catalytic amount of p-toluenesulfonic acid in refluxing toluene for 1 h afforded 2- or 3-substituted 4-phenylthio-4-butanolide (17a-f).Thermolysis in pyridine of 4-phenylsulfinyl 4-butanolides, which were prepared by oxidation of 17a-f, afforded 2- or 3-substituted 2- or 3-buten-4-olides.
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