Rh(1,3-bis(2,4,6-trimethylphenyl)-3,4,5,6-tetrahydropyrimidin-2-ylidene)(COD) tetrafluoroborate, an unsymmetrical Rh-homoazallylcarbene: synthesis, X-ray structure and reactivity in carbonyl arylation and hydrosilylation reactions
作者:Nicolas Imlinger、Klaus Wurst、Michael R. Buchmeiser
DOI:10.1016/j.jorganchem.2004.11.057
日期:2005.10
The synthesis of novel Rh(1,3-bis(2,4,6-trimethylphenyl)-3,4,5,6-tetrahydropyrimidin-2-ylidene)(COD) tetrafluoroborate (1, COD = η4-1,5-cyclooctadiene) is described. The N-heterocyclic carbene acts as a bidentate ligand with the carbene coordinating to the Rh(I) center and an arene group acting as a homoazallyl ligand. 1 was used in various carbonyl arylation and hydrosilylation reactions allowing
Photoinduced electron transfer from enol silyl ethers to quinone. Part 1. Pronounced effects of solvent polarity and added salt on the formation of α-enones
作者:T. Michael Bockman、D. Shukla、Jay K. Kochi
DOI:10.1039/p29960001623
日期:——
The enolsilylethers (ESE) of various ketones are efficiently oxidized to the corresponding α,β-unsaturated enones (E) when a dichloromethane solution containing equimolar amounts of chloranil is irradiated with filtered light (λexc > 380 nm). The 1 : 1 adduct (A) of enolsilylether and quinone is a byproduct, the structure of which is established by X-ray crystallography. Solvent polarity and added
Aromatic Cations from Oxidative Carbon–Hydrogen Bond Cleavage in Bimolecular Carbon–Carbon Bond Forming Reactions
作者:Dane J. Clausen、Paul E. Floreancig
DOI:10.1021/jo301185h
日期:2012.8.3
with 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) to form persistent aromatic oxocarbenium ions through oxidative carbon–hydrogen cleavage. This process is tolerant of electron-donating and electron-withdrawing groups on the benzene ring and additional substitution on the pyran ring. A variety of nucleophiles can be added to these cations to generate a diverse set of structures.
Gustafsson, Magnus; Frejd, Torbjoern, Journal of the Chemical Society. Perkin Transactions 1 (2001), 2002, # 1, p. 102 - 107
作者:Gustafsson, Magnus、Frejd, Torbjoern
DOI:——
日期:——
Hydrosilylation of enones: platinum divinyltetramethyldisiloxane complex in the preparation of triisopropylsilyl and triphenylsilyl enol ethers
作者:Carl R. Johnson、Raj K. Raheja
DOI:10.1021/jo00088a006
日期:1994.5
Enones are regioselectively converted to triisopropylsilyl and triphenylsilyl enol ethers in high yields using triisopropylsilane or triphenylsilane and platinum divinyltetramethyldisiloxane complex 1 (Karstedt's catalyst).