ABSTRACT A facile and novel copper-catalyzed decarboxylative coupling of various arylpropiolic acids with readily available dialkyl hydrazinylphosphonates has been developed, providing an attractive synthetic tool for the synthesis of valuable alkynylphosphonates with operational simplicity and mild reaction conditions. GRAPHICAL ABSTRACT
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
Gold(I)-Catalyzed Hydration of Alkynylphosphonates: Efficient Access to β-Ketophosphonates
作者:Longyong Xie、Rui Yuan、Ruijia Wang、Zhihong Peng、Jiannan Xiang、Weimin He
DOI:10.1002/ejoc.201400066
日期:2014.5
A general, efficient, and highly regioselective protocol with the use of a gold(I) complex catalytic system for the transformation of alkynylphosphonates into the corresponding β-ketophosphonates has been successfully developed. This method produces a variety of β-ketophosphonates with the advantages of mild reaction conditions, high functional-group tolerance, and excellent yields.
Synthesis of β-ketophosphonates via AgNO3-catalyzed hydration of alkynylphosphonates: a rate-enhancement effect of methanol
作者:Jiannan Xiang、Niannian Yi、Ruijia Wang、Linghui Lu、Huaxu Zou、Yuan Pan、Weimin He
DOI:10.1016/j.tet.2014.12.001
日期:2015.1
beta-Ketophosphonates were prepared via AgNO3-catalyzed hydration of alkynylphosphonates with a dramatic rate-enhancement effect of methanol. This benign aqueous-methanol method catalyzed by a low-(c)ost catalyst has simple, atom-economical procedure, and was used effectively with a wide range of substrates. (C) 2014 Elsevier Ltd. All rights reserved.