Untersuchungen an β-Sultonen, 5. Mitt. Zur Reaktion von vicinalen Polycarbonylverbindungen mit Alkansulfonylhalogeniden und Triethylamin,Teil 2

Investigations of β-Sultones, V ¹⁽: On the Reaction of Vicinal Polycarbonyl Compounds with Alkanesulfonyl Halides and Triethylamin 2,3), part 2 The 2-chloro-1,3-dioxoindane-2-yl methanesulfonates 1 , whose synthesis was described in part 1, react with phosphorus pentachloride to yield the sulfonyl chlorides 2 , the decomposition product 3 and the diacylketene dichloride 7 . With amines, compounds 2 afford the 2-(aminomethylidene)-l,3-indanediones 10, rather than the sulfonamides 9 .