K<sub>2</sub>CO<sub>3</sub>-Mediated Cyclization and Rearrangement of γ,δ-Alkynyl Oximes To Form Pyridols
作者:Shun Wang、Yong-Qiang Guo、Zhi-Hui Ren、Yao-Yu Wang、Zheng-Hui Guan
DOI:10.1021/acs.orglett.7b00389
日期:2017.4.7
A novel K2CO3-mediated cyclization and rearrangement of γ,δ-alkynyl oximes for the synthesis of pyridols is described. The process accomplishes an efficient [1,3] rearrangement of the O-vinyl oxime intermediate which is in situ generated from the intramolecular nucleophilic addition of γ,δ-alkynyl oximes. The reaction employs readily accessible starting materials, tolerates a wide range of functional
描述了一种新颖的K 2 CO 3介导的γ,δ-炔基肟的环化和重排,用于合成吡咯。该方法完成了O-乙烯基肟中间体的有效[1,3]重排,该中间体是由γ,δ-炔基肟的分子内亲核加成反应原位产生的。该反应采用容易获得的起始原料,耐受各种官能团,并以高收率得到各种合成上具有挑战性的吡咯。