Vilsmeier-Type Reaction of Dimethylaminoalkenoyl Cyclopropanes: One-Pot Access to 2,3-Dihydrofuro [3,2-<i>c</i>]pyridin-4(5<i>H</i>)-ones
作者:Peng Huang、Ning Zhang、Rui Zhang、Dewen Dong
DOI:10.1021/ol203124f
日期:2012.1.6
A domino reaction of readily available 1-carbamoyl-1-dimethylaminoalkenoylcyclopropanes in the presence of triflic anhydride (Tf2O) in N,N-dimethylformamide (DMF) is described, which provides a facile one-pot access to 2,3-dihydrofuro[3,2-c]pyridin-4(5H)-ones via tandem formylation (Vilsmeier-type reaction), intramolecular cyclization, and ring-enlargement sequences.
描述了在三氟甲磺酸酐(Tf 2 O)存在下于N,N-二甲基甲酰胺(DMF)中容易获得的1-氨基甲酰基-1-二甲基氨基链烯酰基环丙烷的多米诺反应,该反应可轻松地一锅获得2,3-二氢呋喃[3,2 - c ] pyridin-4(5 H)-通过串联甲酰化反应(Vilsmeier型反应),分子内环化和环扩大序列。