Highly Chemoselective Catalytic Hydrogenation of Unsaturated Ketones and Aldehydes to Unsaturated Alcohols Using Phosphine-Stabilized Copper(I) Hydride Complexes
作者:Jian-Xin Chen、John F. Daeuble、Donna M. Brestensky、Jeffrey M. Stryker
DOI:10.1016/s0040-4020(99)01098-4
日期:2000.4
phenyldimethylphosphine-stabilized copper(I) hydride complex provides for the highly chemoselective hydrogenation of unsaturated ketones and aldehydes to unsaturated alcohols, including the regioselective 1,2-reduction of α,β-unsaturated ketones and aldehydes to allylic alcohols. The active catalyst can be derived in situ by phosphine exchange using commercial [(Ph3P)CuH]6 or from the reaction of copper(I) chloride
Cerium-free Luche reduction directed by rehydrated alumina
作者:Ebenezer Jones-Mensah、Leslie A. Nickerson、Jackson L. Deobald、Hailey J. Knox、Alyssa B. Ertel、Jakob Magolan
DOI:10.1016/j.tet.2016.03.017
日期:2016.6
A 1,2-regioselective reduction of α,β-unsaturatedketones to their corresponding allylicalcohols is accomplished with NaBH4 in the presence of acidic activated alumina rehydrated to the Brockmann II grade by adding 3 % w/w water. The substrate scope includes eight ketones reduced in high regio- and diastereoselectivity to their corresponding allylicalcohols. This is the first example of the strategy
Hydride-mediated homogeneous catalysis. Catalytic reduction of .alpha.,.beta.-unsaturated ketones using [(Ph3P)CuH]6 and H2
作者:Wayne S. Mahoney、Jeffrey M. Stryker
DOI:10.1021/ja00206a008
日期:1989.11
Hydride-mediated reduction of alpha},beta}-unsaturated ketones catalytic in the hydride reagent is reported using ((Phsub 3}P)CuH)sub 6} and molecular hydrogen. The reaction proceeds at room temperature and is highly regioselective, affording either the product of conjugate reduction or complete 1,4- and 1,2-reduction to the saturated alcohol, depending on reaction conditions. In the presence of
Stoffwechselprodukte von Mikroorganismen. 218. Mitteilung. Versuche zur Strukturaufklärung von Niphimycin, 1. Teil. Reinigung und Charakterisierung der Niphimycine Iα und Iβ sowie Abbau mit Salpetersäure
Crystal Structural Study on 2:1 Complexes of Equatorial Isomers of 3,5-Dimethylcyclohexanone and 3,5-Dimethylcyclohexanol with 1,1,6,6-Tetraphenylhexa-2,4-diyne-1,6-diol
Selective inclusion of the diequatorial isomer of 3,5-dimethylcyclohexanone and the triequatorial isomer of 3,5-dimethylcyclohexanol by 1,1,6,6-tetraphenylhexa-2,4-diyne-1,6-diol was observed. The crystal structure of these complexes was studied.