α-Hydroxylation of 1,3-Dicarbonyl Compounds Catalyzed by Polymer-incarcerated Gold Nanoclusters with Molecular Oxygen
作者:Hiroyuki Miyamura、Shū Kobayashi
DOI:10.1246/cl.2012.976
日期:2012.9.5
α-Hydroxylation of 1,3-dicarbonyl compounds was successfully catalyzed by carbon-stabilized polymer-incarcerated gold nanoclusters (PI/CB-Au). The reaction proceeded under mild conditions using mol...
Direct conversion of α,β-unsaturated nitriles into cyanohydrins using Mn(dpm)3 catalyst, dioxygen and phenylsilane
作者:Philip Magnus、David A Scott、Mark R Fielding
DOI:10.1016/s0040-4039(01)00693-1
日期:2001.6
Treatment of alpha,beta -unsaturated nitriles with Mn(dpm)(3) (3 mol%), PhSiH3 in isopropyl alcohol in the presence of oxygen resulted in reduction and alpha- and beta -hydroxylation. (C) 2001 Elsevier Science Ltd. All rights reserved.
Magnesium Monoperphthalate (MMPP): a Convenient Oxidant for the Direct Rubottom Oxidation of Malonates, β‐Keto Esters, and Amides
Commerciallyavailable and inexpensive magnesium monoperphthalate (MMPP) was found to be an effective oxidant for the first direct Rubottom hydroxylation of α‐substituted malonates, β‐ketoesters, and β‐ketoamides, when working in ethanol at room temperature and using NaHCO3 as basic additive. The feasibility of gram scale oxidation was also demonstrated.
mixture of ethyl2-(ethoxydifluoromethyl)-2-hydroxyalkanoates, 1,1-bis(ethoxydifluoromethyl)alkan-1-ols when administered at room temperature in dichloromethane. The reaction was exploited in the synthesis of nucleus- and side-chain polyfluorinated indoles. The fluorination of substituted diethyl 2-[(1-tert-butoxycarbonylindol-3-yl)methyl]-2-hydroxymalonates with DAST gave a mixture of ethyl2-(ethoxy