Aerobic oxidative alkynylation of H-phosphonates and amides: an efficient route for the synthesis of alkynylphosphonates and ynamides using a recyclable Cu–MnO catalyst
作者:Harshvardhan Singh、Tapan Sahoo、Chiranjit Sen、Sunil M. Galani、Subhash Chandra Ghosh
DOI:10.1039/c9cy00275h
日期:——
and efficient route for the synthesis of alkynylphosphonates and ynamides by aerobic oxidative alkynylation of H-phosphonates and amides with both aliphatic and aromatic alkynes using our synthesized recyclable heterogeneous Cu–MnO catalyst has been developed. The phosphorylation was carried out under base- and ligand-free conditions, and in the presence of air as the sole oxidant. The reaction is compatible
Abstract Copper is found to be an effective catalyst for the preparation of alkynylphophonates. A novel copper-catalyzed one-potsynthesis of alkynylphophonates from terminal alkynes and dialkyl phosphites is developed which involves the haloalkynes intermediates. This method provides a unique and alternative approach to the well-documented oxidative coupling or arylpropiolic acid strategies. Graphical
A facile palladium-catalyzed addition/cyclization of (2-hydroxyaryl)boronic acids with alkynylphosphonates has been developed, providing an effective strategy to construct a series of valuable phosphacoumarins. This methodology features excellent regioselectivity and broad substrate tolerance.
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.