Topic
Benzopyrans
About: Benzopyrans is a research topic. Over the lifetime, 694 publications have been published within this topic receiving 8830 citations.
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TL;DR: In this paper, the linear (65-81%) and angular (51-60%) bioactive natural and unnatural benzopyran derivatives are produced exclusively in one step and described via phenol-keto resonance.
Abstract: Remarkably tuned regioselectivities are obtained in the condensation of 3,5-dihydroxyphthalide (1) with several α,β-unsaturated aldehydes using DBU and neutral conditions. The linear (65-81%) and angular (51-60%) bioactive natural and unnatural benzopyran derivatives are produced exclusively in one step and are described via phenol-keto resonance.
2 citations
2 citations
2 citations
TL;DR: Synthese stereoselective d'allyl-4 resorcinols par reaction de composes organiques d'aluminium ou de magnesium avec des alkyl-2 aryl-3 chromenols-7; cette methode donne de meilleurs rendements que la reduction de dialkyl 2,4 aryls 3 chromenol-7 (effet des substituants) as mentioned in this paper.
Abstract: Synthese stereoselective d'allyl-4 resorcinols par reaction de composes organiques d'aluminium ou de magnesium avec des alkyl-2 aryl-3 chromenols-7; cette methode donne de meilleurs rendements que la reduction de dialkyl-2,4 aryl-3 chromenols-7 (effet des substituants)
2 citations
Journal Article•
TL;DR: Synthese des composes du titre par action du malononitrile sur des arylidene-3 chromannones-4 respectivement en presence de piperidine ou de soude as discussed by the authors.
Abstract: Synthese des composes du titre par action du malononitrile sur des arylidene-3 chromannones-4 respectivement en presence de piperidine ou de soude. Mecanismes
2 citations