Ring-opening of epoxyalcohols by diethylaluminium cyanide. Regio- and stereoselective synthesis of 1-cyano-2,3-diols
摘要:
Diethylaluminium cyanide is a highly selective reagent for the ring opening of 2,3-epoxyalcohols under mild conditions; the reaction takes place at C-3, with inversion of configuration, to give 1-cyano-2,3-diols. (C) 1999 Elsevier Science Ltd. All rights reserved.
Colloidal nickel(0)-carboxymethyl cellulose particles: A biopolymer-inorganic catalyst for hydrogenation of nitro-aromatics and carbonyl compounds
作者:Mohamed Anouar Harrad、Brahim Boualy、Larbi El Firdoussi、Ahmad Mehdi、Claudio Santi、Stefano Giovagnoli、Morena Nocchetti、Mustapha Ait Ali
DOI:10.1016/j.catcom.2012.11.025
日期:2013.2
Colloidal solution of nickel(0) in carboxymethyl cellulose showed good catalytic efficiency in hydrogenation of aromatic nitro compounds, as well as aliphatic and aromatic ketones in aqueous medium yielding the respective aromatic amines and alcohols in excellent yield along with moderate to good reusability of the catalyst. The catalyst was isolated and characterized by powder XRD, EDX, SEM and TEM