Indolizines. 4. Dyes derived from oxoindolizinium ions and active methylene compounds

CH Weidner, DH Wadsworth, SL Bender…

Index: Weidner, C. H.; Wadsworth, D. H.; Bender, S. L.; Beltman, D. J. Journal of Organic Chemistry, 1989 , vol. 54, # 15 p. 3660 - 3664

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Citation Number: 50

Abstract

Dyes of a new class, incorporating the dihydro-1-oxoindolizine structural unit, have been synthesized. Oxo-indolizinium ions react with active methylene compounds to give dyes (Amm 560-630 nm) in high yield. The syntheses of the dihydro-1-oxoindolizinium ions and representative dyes from their reactions with active methylene compounds, along with the spectral and physical properties of the intermediates and the dyes, are presented. One ...