Direct synthesis of alkynylphosphonates from alkynes and phosphite esters catalyzed by Cu/Cu<sub>2</sub>O nanoparticles supported on Nb<sub>2</sub>O<sub>5</sub>
作者:Tao Yuan、Fei Chen、Guo-ping Lu
DOI:10.1039/c8nj03206h
日期:——
aerobic oxidativecoupling of alkynes and phosphite esters can be catalyzed by Cu/Cu2O nanoparticles supported on Nb2O5 (Cu/Cu2O@Nb2O5) to efficiently afford alkynylphosphonates. The catalyst can be reused by filtration and reduction. According to the results of control experiments and characterization data, the supporter Nb2O5 can reduce the electronic density of Cu and absorb the phosphite esters
炔烃和亚磷酸酯的需氧氧化偶联可以通过负载在Nb 2 O 5上的Cu / Cu 2 O纳米颗粒(Cu / Cu 2 O @ Nb 2 O 5)进行催化,从而有效地得到炔基膦酸酯。催化剂可以通过过滤和还原再利用。根据控制实验和表征数据的结果,载体Nb 2 O 5的强路易斯酸位点可以降低Cu的电子密度并吸收亚磷酸酯,从而可以有效地增强反应。
An efficient and recyclable silica-supported carbene-Cu(II) catalyst for the oxidative coupling reaction of terminal alkynes with H-phosphonates under base-free reaction conditions
作者:Ping Liu、Jin Yang、Pinhua Li、Lei Wang
DOI:10.1002/aoc.1847
日期:2011.11
The oxidativecouplingreactions of terminalalkynes with H‐phosphonates were explored using SiO2−NHC−Cu(II) (5.0 mol%) as catalyst at room temperature under base‐free reactionconditions. The reactions of a variety of terminalalkynes with H‐phosphonates generated the corresponding alkynylphosphonate products in good to excellent yields. In addition, SiO2−NHC−Cu(II) could be recovered and recycled
A new simple method for the synthesis of 1-alkynylphosphonates using (EtO)2P(O)CCl3 as precursor
作者:Rachel Dizière、Philippe Savignac
DOI:10.1016/0040-4039(96)00131-1
日期:1996.3
1-Alkynylphosphonates 4 were obtained from (EtO)2P(O)CCl31 and aldehydes in a one-pot procedure. It involves the formation of α-chlorovinyl phosphonate intermediates 3 by a Peterson olefination reaction followed by dehydrochlorination with LiHMDS.