Diruthenium(II,II) tetrakis(acetate) as a catalyst of choice for intermolecular insertion of stabilized diazocompounds into OH bonds
作者:Sergio Cenini、Giancarlo Cravotto、Giovanni B Giovenzana、Giovanni Palmisano、Andrea Penoni、Stefano Tollari
DOI:10.1016/s0040-4039(02)00618-4
日期:2002.5
In the presence of 3 mol% of [Ru(OAc)(2)](2) at 90degreesC in hexafluorobenzone or alcohols as solvents the highly stabilized diazocoumarin 1 undergoes insertion into the OH bond of alcohols (and phenols) regio- and chemoselectively, affording the corresponding 3-alkoxy-4-hydroxycoumarin in moderate to excellent yields. (C) 2002 Elsevier Science Ltd. All rights reserved.