Syntheses of pyrazolo-, isoxazolo-, pyrido- and pyrimido-carbazoles from2-13,4-dimethoxybenzylidene)-2,3,4,9-tetrahydrocarbazol-1-ones

摘要

Mixed aldol condensation of 2,3,4,9-tetrahydrocarbazol-1-ones with 3,4-dimethoxybenzaldehyde (veratraldehyde)yielded 2-(3,4-dimethoxybenzylidene)-2,3,4,9-tetrahydrocarbazol-1-ones. These enones on reaction with hydrazine