Monatshefte für Chemie/Chemical Monthly

Zur Chemie der vicinalen Triketone, XII Versuche zur Darstellung vonSchiffschen Basen aus cyclischen, vicinalen Triketonen

F Günzl, H Wittmann

Index: Guenzl,F.; Wittmann,H. Monatshefte fuer Chemie, 1982 , vol. 113, p. 1299

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Abstract

Abstract The quinolinetriones TMCH, PCH, MCH and phenalene trione (PT) do not react with aryl isocyanates to Schiff bases 5a, but react by ring contraction to yield the spiro- imidazolidines 2 ad, 3 ae, 4 ab and 5 ac bd. However, reaction of ninhydrine with aryl isocyanates gives the 1: 2 adductes 1 ae. Benzal aniline reacts with TMCH, PCH. and PT to yield known phenoxazine derivatives 2c, 11. In contrast, PCH or MCH react with ...