The Journal of Organic Chemistry

Aldol condensations of leucoquinizarin

CE Lewis

Index: Lewis,C.E. et al. Journal of Organic Chemistry, 1970 , vol. 35, # 9 p. 2938 - 2942

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Citation Number: 28

Abstract

Hydrochloric acid was found to be an effective catalyst for condensation of leucoquinizarin with aromatic mono-and dialdehydes but ineffective with aliphatic aldehydes; o-dialdehydes gave polycyclic compounds. Piperidinium acetate was found to be effective for both aliphatic and aromatic aldehydes. They are presented in relationship to previously reported alkaline dithionite condensations. A mechanism is proposed in which the dehydration step is ...