A new oxapalladacycle generated via ortho C–H activation of phenylphosphinic acid: an efficient catalyst for Markovnikov-type additions of E–H bonds to alkynes
Hydrophosphorylation of Alkynes Catalyzed by Palladium: Generality and Mechanism
作者:Tieqiao Chen、Chang-Qiu Zhao、Li-Biao Han
DOI:10.1021/jacs.8b00550
日期:2018.2.28
H-phosphonates disfavored the addition. For H-phosphinates and secondary phosphine oxides, Pd/dppe/Ph2P(O)OH was the catalyst of choice, which led to highly regioselective formation of the Markovnikov adducts. By using Pd(PPh3)4 as the catalyst, hypophosphinic acid added to terminal alkynes to give the corresponding Markovnikov adducts. Phosphinic acids, phosphonic acid, and its monoester were not applicable
A new oxapalladacycle generated via ortho C–H activation of phenylphosphinic acid: an efficient catalyst for Markovnikov-type additions of E–H bonds to alkynes
作者:Qing Xu、Ruwei Shen、Yutaka Ono、Ritsuko Nagahata、Shigeru Shimada、Midori Goto、Li-Biao Han
DOI:10.1039/c0cc03436c
日期:——
A new oxapalladacycle 3 can be conveniently prepared via direct ortho palladation of diphenylphosphinic acid with palladium acetate. Catalysts derived from 3 can efficiently catalyze Markovnikov-type additions of EâH bonds (P(O)âH, SâH and spCâH) to alkynesvia a unique catalytic cycle.