Topic
Benzopyran
About: Benzopyran is a research topic. Over the lifetime, 1889 publications have been published within this topic receiving 15235 citations.
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TL;DR: In this article, isobenzofuran and benzopyran derivatives are obtained by the title reaction and not as described in earlier publications five- or six-membered lactams.
Abstract: Remarkably, isobenzofuran and benzopyran derivatives are obtained by the title reaction and not as described in earlier publications five- or six-membered lactams.
TL;DR: On the other hand, the authors showed that on heating under reflux in dry MeOH, aliphatic nitrones 2a−d produce corresponding carboxylic acids 4 but aromatic nitrones 1a−D give aldehyde 1.
Abstract: On hydrolysis with 70% H2SO4, aliphatic nitrones 2a–d produce the corresponding carboxylic acids 4 but aromatic nitrones 2e, f give aldehyde 1. On heating under reflux in dry MeOH, 2a–d rearrange t...