Base-Promoted Cascade Reactions of 3‑(1-Alkynyl)chromones with Pyridinium Ylides to Chromeno[2,3‑<i>d</i>]azepine Derivatives
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资源简介：
A base-promoted cascade reaction of 3-(1-alkynyl)chromones with pyridinium ylides has been developed to afford a novel chromeno[2,3-d]azepine scaffold in an efficient and economic manner. This tandem process involves multiple reactions including a Michael addition/deprotonation/alkyne–allene isomerization/cyclization and the subsequent 1,2-addition under mild conditions without a transition metal catalyst.
创建时间：
2019-03-07
