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
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
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。