The reaction represents an obvious example showing that the photochemical approach is effective to offset such an entropic cost, and thereby to drive thermodynamically uphill addition reactions. Moreover the present reactions are highly expedient from the synthetic view point, being transition-metal-catalyst-free, scalable, highly atom economical, and regioselective. The product amines can be converted
Nucleophilic substitution reactions of aminoalkylbenzotriazoles with ytterbium metal umpoled diaryl ketones
作者:Weike Su、Bibo Yang、Yongmin Zhang
DOI:10.1016/s0040-4039(02)00235-6
日期:2002.3
The reaction of diarylketones such as benzophenone with aminoalkylbenzotriazoles in the presence of ytterbium metal at room temperature has been found to give 2-amino alcohols in good yields under mild and neutral conditions.
SINGLE-SITE CATALYST ACTIVATORS, PROCESSES FOR MAKING SAME, AND USE THEREOF IN CATALYSTS AND POLYMERIZATION OF OLEFINS
申请人:Luo Lubin
公开号:US20090247398A1
公开(公告)日:2009-10-01
Single-site catalyst activator compositions are provided, said activator compositions comprising anion/cation ion pair wherein; (a) the anion comprises a metal atom bonded via hetero atoms to a chelating organic ligand, and (b) the cation comprises a Bronsted acid.