New and Efficient Synthesis of 1,3-Dienylphosphonates by Palladium-Catalyzed Substitution of Propargylic Esters to Diethyl Phosphite
作者:Xiao-Ning Liu、Wei-Lei Guo、Chuan-Jin Hou、Xiang-Ping Hu
DOI:10.1080/00397911.2012.725795
日期:2013.10.2
Abstract An efficient route to the synthesis of 1,3-dienylphosphonates (1) has been developed for the first time by the substitution of propargylic esters (2) to the diethyl phosphite (3) nucleophile in the presence of Pd2(dba)3 · CHCl3 (2 mol %) and 2,2′-bis(diphenylphosphino)-1,1′-binaphthyl (4 mol%). Both the alkyl and aryl 1,3-dienylphosphonates can be prepared from this transformation. Supplemental
摘要 通过在 Pd2(dba)3 存在下将炔丙酯 (2) 取代为亚磷酸二乙酯 (3) 亲核试剂,首次开发了合成 1,3-二烯基膦酸酯 (1) 的有效途径。 CHCl3 (2 mol%) 和 2,2'-双(二苯基膦)-1,1'-联萘 (4 mol%)。烷基和芳基 1,3-二烯基膦酸酯均可从该转化制备。补充材料可用于本文。转至出版商的 Synthetic Communications® 在线版以查看免费的补充文件。图形概要