Metal complexes of functionalized phosphines-I. Synthesis and characterization of 2-diphenylphosphinoethylamines and some of their complexes with platinum. X-ray structure of [HBut)(Ph2PCH2CH2NHBut·HCl)Cl]Cl·H2O
摘要:
The new bidentate ligands Ph2PCH2CH2NHR [R = Bu(t), CH2Ph, CH(Me) Ph] and Ph2PCH2CH2N(CH2Ph)2 and their corresponding hydrochloride salts have been synthesized and were characterized by H-1, P-31-{H-1} and C-13-{H-1} NMR spectroscopy. The ligand Ph2PCH2CH2NHBu(t) reacts with K2PtCl4 or (COD)PtCl2 to form [P activated t(Ph2PCH2CH2NHBu(t))(Ph2PCH2CH2NHBu(t).HCl)Cl]Cl whose structure has been determined by X-ray diffraction. Treatment of this complex with HCl gas gives [Pt(Ph2PCH2CH2NHBu(t).HCl)2Cl2] which can also be synthesized from Ph2PCH2CH2NHBu(t).HCl and K2PtCl4.
Using Catalysts To Make Catalysts: Titanium-Catalyzed Hydroamination To Access <i>P,N</i>-Ligands for Assembling Catalysts in One Pot
作者:Han Hao、Thibault Bagnol、Mathieu Pucheault、Laurel L. Schafer
DOI:10.1021/acs.orglett.0c04212
日期:2021.3.19
Using a diamido-bis(amidate) titanium precatalyst, the hydroamination of alkynylphosphines afforded phosphinoenamine products. After reduction, 2-aminophosphines are prepared in excellent yield and on gram scale. A broad variety of alkynylphosphines and primary amines with different electronic and steric features are tolerated in this sequential transformation, enabling the rapid assembly of a collection