Allenylphosphonates/Allenylphosphine Oxides as Intermediates/Precursors for Intramolecular Cyclization Leading to Phosphorus-Based Indenes, Indenones, Benzofurans, and Isochromenes
作者:K. V. Sajna、K. C. Kumara Swamy
DOI:10.1021/jo300705f
日期:2012.6.15
Utilizing internally available functional groups, a simple protocol for the efficient synthesis of phosphorus-based indenes, indenones, benzofurans, and isochromenes via intramolecular cyclization of allene intermediates/precursors is generated; the latter intermediates/precursors are conveniently obtained through aldehyde-, alkylidene-, and hydroxyl-functionalized propargyl alcohols and PIII–Cl precursors
利用内部可用的官能团,产生了一个简单的方案,用于通过丙二烯中间体/前体的分子内环化有效合成磷基茚满,茚满,苯并呋喃和异色酮;后者的中间体/前体可通过醛,亚烷基和羟基官能的炔丙醇和P III -Cl前体方便地获得。X射线晶体学已明确证实了关键产品的结构。