涉及原位产生的硝酮的分子内硝酮-烯烃环加成反应的反应曲线不同于先前报道的嘧啶体系。调整苯环的电子密度对顺/反式选择性有重要影响。这些反应可用于合成新型三环六氢苯并[ b ]异恶唑并[3,4- f ] [1,4]二唑-4(1 H)-ones和六氢异恶唑并[3,4- f ]吡啶[3,2 - b ] [1,4] diazocin-4(1 ħ) -酮以良好的收率下温和的反应条件
涉及原位产生的硝酮的分子内硝酮-烯烃环加成反应的反应曲线不同于先前报道的嘧啶体系。调整苯环的电子密度对顺/反式选择性有重要影响。这些反应可用于合成新型三环六氢苯并[ b ]异恶唑并[3,4- f ] [1,4]二唑-4(1 H)-ones和六氢异恶唑并[3,4- f ]吡啶[3,2 - b ] [1,4] diazocin-4(1 ħ) -酮以良好的收率下温和的反应条件
Preparation of substituted 1,2,3,4-tetrahydroquinoxalines and 2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepines from catalytic Cp∗Ir hydrogen transfer N-heterocyclization of anilino alcohols
作者:C. Todd Eary、Dane Clausen
DOI:10.1016/j.tetlet.2006.07.033
日期:2006.9
The [Cp*IrCl2](2)/K2CO3 catalyzed hydrogen transfer N-heterocyclization on a series of anilino alcohols has been investigated. The catalyst (20% loading) converts anilino alcohols to 1,2,3,4-tetrahydroquinoxalines and 2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepines in 30-84% isolated yield. (c) 2006 Published by Elsevier Ltd.