A novel palladium-catalyzedhydrophosphination of alkynes with tetraphenyldiphosphine takes place regioselectively to provide vinylic phosphines, which undergo air-oxidation during workups, affording the corresponding vinylphosphine oxides in good yields.
Palladium-Catalyzed Hydrophosphination of Terminal Alkynes with Diphenylphosphine Oxide in the Presence of Tetraphenyldiphosphine Monoxide
作者:Yuki Yamamoto、Kohsuke Fujiwara、Akiya Ogawa
DOI:10.1021/acs.organomet.2c00659
日期:——
In this study, the Pd(OAc)2-catalyzed hydrophosphination of terminal alkynes was investigated in detail by using various diphosphines, which have a P–P bond, and the detailed mechanistic insights led to the successful development of a novel Pd-catalyzed hydrophosphination of terminal alkynes using Ph2P(O)H as both the phosphorus and hydrogen source. This catalytic transformation was successfully promoted
A novel transition-metal-catalyzed hydrophosphination of terminal alkynes using a diphosphine-hydrosilane binary system takes place regioselectively to provide vinylic phosphines, which undergo air oxidation during workup, affording the corresponding vinylphosphine oxides in good yields. In this hydrophosphination, hydrosilanes act as a useful hydrogen source, and furthermore, small amounts of oxygen is required to accomplish the reaction efficiently.
Manganese(<scp>i</scp>)-catalyzed access to 1,2-bisphosphine ligands
作者:Luo Ge、Syuzanna R. Harutyunyan
DOI:10.1039/d1sc06694c
日期:——
we present the first catalyticasymmetric hydrophosphination of α,β-unsaturated phosphine oxides in the presence of a chiralcomplex of earth-abundant manganese(I). This catalytic system offers a short two-step, one-pot synthetic sequence to easily accessible and structurally tunable chiral 1,2-bisphosphines in high yields and enantiomeric excess. The resulting bidentate phosphine ligands were successfully