SYNTHESIS OF CHROMENO[2,3-b]INDOLE DERIVATES
Heterocycles（2013）
Abstract
Several new chromeno[2,3-b]indole tetracycles were synthesized by the reaction of 2'-hydroxyacetophenones or 2'-hydroxypropiophenones and salicylaldehyde derivates. Under the harsh reaction conditions, the initially formed Knoevenagel adducts lost water, giving rise to the formation of ring closed tetracyclic products.
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Key words
Knoevenagel Condensation Reaction,Indole,Acetophenone
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