Iron oxide-silver magnetic nanoparticles as simple heterogeneous catalysts for the direct inter/intramolecular nucleophilic substitution of π-activated alcohols with electron-deficient amines
作者:Xingzhu Xu、Haibo Wu、Zhengyi Li、Xiaoqiang Sun、Zhiming Wang
DOI:10.1016/j.tet.2015.06.028
日期:2015.8
The development of bimetallic iron oxide-silver magnetic nanoparticles (Fe2O3-Ag MNPs) catalytic system provides an efficient heterogeneous synthetic pathway to allylic amines and 1,2-dihydroquinolines involving the direct inter/intramolecular nucleophilic substitution of pi-activated alcohols with electron-deficient amines. The major advantages of the present method are wide substrate scope, simple product separation, low catalyst loading, and magnetically recyclable catalyst. (C) 2015 Elsevier Ltd. All rights reserved.
Cross-Coupling of N-Allylic Sulfonimides with Organozinc Reagents at Room Temperature
An efficient cross-coupling reaction of N-allylicsulfonimides with organozincreagents has been developed. In the presence of 1 mol-% of Pd 2 (dba) 3 , a range of N-allylicsulfonimides smoothly couple with various organozincreagents at roomtemperature to give the corresponding (E)-alkene products in moderate to excellent yields and with good to exclusive α-selectivity. It is noteworthy that allyl