Journal
SYNTHETIC COMMUNICATIONS
Volume 40, Issue 19, Pages 2930-2934Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/00397910903340686
Keywords
Aldehydes; ethylacetoacetate; glycine; hydrazine hydrate; malononitrile; pyranopyrazoles; water
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A facile and convenient protocol is developed for the fast (5-20min) and high-yielding (85-95%) synthesis of fused pyranopyrazoles from ethyl acetoacetate, hydrazine hydrate, an aldehyde, and malononitrile in the presence of nontoxic, simple, and readily available organocatalyst glycine in aqueous medium at 25 degrees C.
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