Heterocyclic syntheses via carbanionically induced rearrangement reactions

D Hellwinkel, R Lenz, F Lämmerzahl

Index: Hellwinkel, Dieter; Lenz, Ruediger; Lammerzahl, Frank Tetrahedron, 1983 , vol. 39, # 12 p. 2073 - 2084

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Citation Number: 11

Abstract

The easily occurring [1.3]-migrations of sulfonyl and carbonyl functions to neighboring phenyl anions can be utilized for ring expansions by one benzo unit when suitably tailored precursor heterocycles are used. Thus, the 1, 2-benzisothiazol dioxide systems 8 and 17 can be transformed into di-benzo [b, f][1, 4] thiazepin dioxides 12 and 21, respectively, whereas the dibenzo [c, e][1, 2]-and 1, 2, 4-benzothiazin dioxide models 35 and 46 give ...