α- and β-Functionalized Ketones from 1,3-Dienes and Aldehydes: Control of Regio- and Enantioselectivity in Hydroacylation of 1,3-Dienes
作者:Mahesh M. Parsutkar、T. V. RajanBabu
DOI:10.1021/jacs.1c06245
日期:2021.8.18
oxidative dimerization mechanism that involves a Co(I)/Co(III) redox cycle that appears to be initiated by a cationic Co(I) intermediate. Studies of reactions using isolated neutral and cationic Co(I) complexes confirm the critical role of the cationic intermediates in these reactions. Enantioselective 1,2-hydroacylation of 2-trimethylsiloxy-1,3-diene reveals a hitherto undisclosed route to chiral siloxy-protected
Pentafluorophenyl derivatives of transition metals
作者:John R. Phillips、D.T. Rosevear、F.G.A. Stone
DOI:10.1016/s0022-328x(00)83260-x
日期:1964.12
Several new complexes in which pentafluorophenyl groups are σ-bonded to nickel have been prepared by treating bis(tertiaryphosphine)nickel dihalides, or bipyridylnickel dichloride, with pentafluorophenylmagnesium bromide and pentafluorophenyl-lithium. The synthesis of [1,2-bis(diphenylphosphino)ethane]bis(pentafluorophenyl)-cobalt is also reported. Bis(triethylphosphine)pentafluorophenylnickel chloride
已经通过用五氟苯基溴化镁和五氟苯基锂处理双(叔膦)镍二卤化物或联吡啶二氯化镍,制备了其中五氟苯基被σ键合到镍上的几种新络合物。还报道了[1,2-双(二苯基膦基)乙烷]双(五氟苯基)-钴的合成。双(三乙基膦)五氟苯基氯化镍可以通过以下方法转化为[[C 2 H 5)3 P] 2 Ni(C 6 F 5)I和[(C 2 H 5)3 P] 2 Ni(C 6 F 5)SCN易位反应。
Catalytic Enantioselective Hetero-dimerization of Acrylates and 1,3-Dienes
作者:Stanley M. Jing、Vagulejan Balasanthiran、Vinayak Pagar、Judith C. Gallucci、T. V. RajanBabu
DOI:10.1021/jacs.7b10055
日期:2017.12.13
counterion, and solventeffects uncovered during the course of these investigations show a unique role of a possible cationic Co(I) intermediate in these reactions. The rational evolution of a mechanism-based strategy that led to the eventual successful outcome and the attendant support studies may have further implications for the expanding use of low-valent group 9 metal complexes in organic synthesis
The synthesis of new bimetallic complex salts by halide/sulfur chelate cross transfer: X-ray crystal structures of the salts [Ni(S2CNEt2)(dppe)]2[HgBr4], [Pt(S2CNEt2)(dppe)]2[CdCl4], [Co(S2CNEt2)2(dppe)]2[Cl3ZnO:(Ph)2PCH2CH2P(Ph)2:OZnCl3] and [Pd(S2CNnBu2)(bipy)]2[CdCl4]
作者:George Exarchos、Stephen D Robinson、Jonathan W Steed
DOI:10.1016/s0277-5387(01)00885-3
日期:2001.11
[Zn(S2CNEt2)2] in the presence of (S2CNEt2)2 affords the novelcomplex [Co(S2CNEt2)2(dppe)]2[Cl3ZnO:(Ph)2PCH2CH2P(Ph)2:OZnCl3]. A selection of these salts have been fully characterised by elemental analysis and spectroscopic techniques, the remainder have been identified by spectroscopic methods alone. X-raycrystalstructures are reported for the salts [Ni(S2CNEt2)(dppe)]2 [HgBr4], [Pt(S2CNEt2)(dppe)]2[CdCl4]
Structure and properties of ionic fullerene complex Co+(dppe)2·(C60˙−)·(C6H4Cl2)2: distortion of the ordered fullerene cage of C60˙− radical anions
作者:Dmitri V. Konarev、Alexey V. Kuźmin、Sergey V. Simonov、Salavat S. Khasanov、Evgeniya I. Yudanova、Rimma N. Lyubovskaya
DOI:10.1039/c1dt10039d
日期:——
New ioniccomplexCo+(dppe)2}·(C60˙−)·(C6H4Cl2)2 (1) was obtained by the reduction of a Co(dppe)Br2 and C60 mixture by TDAE in o-dichlorobenzene followed by precipitation of crystals by hexane. Optical and EPRspectra of 1 indicated the formation of C60˙−radical anions and diamagnetic Co+(dppe)2 cations. The structure of 1 solved at 100(2) K involves chains of C60˙− arranged along the lattice a-axis