Copper-Catalyzed Vicinal Cyano-, Thiocyano-, and Chlorophosphorylation of Alkynes: A Phosphinoyl Radical-Initiated Approach for Difunctionalized Alkenes
作者:Ze-Kun Tao、Cheng-Kun Li、Jian-An Li、Adedamola Shoberu、Wei Zhang、Jian-Ping Zou
DOI:10.1021/acs.orglett.1c01286
日期:2021.6.4
A copper-catalyzed difunctional cyano-, thiocyano-, and chlorophosphorylation reaction of alkynes with P(O)–Hcompounds and coupling partners (TBACN, TMSNCS, TMSCl) is described. The reaction introduces versatile groups (−P(O)R2 and −CN, −SCN, or −Cl) to form tri- and tetrasubstituted alkenyl phosphine oxides/phosphonates regio- and stereoselectively.
Silver-Free Direct Synthesis of Alkynylphosphine Oxides via <i>sp</i>C–H/P(O)–H Dehydrogenative Coupling Catalyzed by Palladium
作者:Jian-Qiu Zhang、Tieqiao Chen、Ji-Shu Zhang、Li-Biao Han
DOI:10.1021/acs.orglett.7b02389
日期:2017.9.1
silver-free palladium-catalyzed dehydrogenative phosphorylation of terminal alkynes with hydrogen phosphine oxides has been developed. Both aromatic and aliphatic terminal alkynes including those bearingfunctionalgroups coupled readily with hydrogen phosphine oxides, producing the corresponding value-added alkynylphosphine oxides in good to excellent yields. This reaction could be easily conducted
Additive-free coupling of bromoalkynes with secondary phosphine oxides to generate alkynylphosphine oxides in acetic anhydride
作者:Hongjie Ruan、Ling-Guo Meng、Hailong Xu、Yuqing Liang、Lei Wang
DOI:10.1039/c9ob02750e
日期:——
A coupling of bromoalkynes with secondaryphosphineoxides was developed for the synthesis of alkynylphosphine oxides. This transformation was accomplished under additive-free conditions in acetic anhydride (Ac2O). The reaction could be carried out under mild conditions, and a wide range of secondaryphosphineoxides were obtained in good yields.
Preparations of N- and P-substituted acetylenes under metal-free conditions
作者:Hong Chen、Qingjuan Zheng、Wanrong Dong、Zhihong Peng、Delie An
DOI:10.1080/00397911.2016.1198812
日期:2016.9.1
ABSTRACT An efficient strategy towards triazole- or phosphine-oxide-substituted alkynes with the assistance of strong base LiHMDS is described. The facile and practical reaction took place from easily prepared substrates in a one-pot manner without participation of any transition metal catalysts or ligands, exhibiting good functional groups tolerance (up to 37 examples) and high efficiency (up to 90%