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Synthesis of new spiropyrans based on 2,3-cycloalkenobenzopyrylium salts

Research paper by N. E. Shelepin, L. E. Nivorozhkin, G. N. Dorofeenko, V. I. Minkin

Indexed on: 01 Oct '70Published on: 01 Oct '70Published in: Chemistry of Heterocyclic Compounds



Abstract

A method is described for the synthesis of spiropyrans from 2,3-cycloalkenobenzopyrylium salts and hydroxyaldehydes with subsequent treatment of theα-styryl derivatives with ammonia in ether.