Efficient aerobic oxidative synthesis of 2-aryl quinazolines via benzyl C–H bond amination catalyzed by 4-hydroxy-TEMPO
作者:Bing Han、Chao Wang、Run-Feng Han、Wei Yu、Xiao-Yong Duan、Ran Fang、Xiu-Long Yang
DOI:10.1039/c1cc12308d
日期:——
A novel and efficient aerobic protocol for the oxidative synthesis of 2-aryl quinazolinesviabenzyl C-H bond amination by a one-pot reaction of arylmethanamines with 2-aminobenzoketones and 2-aminobenzaldehydes has been carried out using the 4-hydroxy-TEMPO radical as the catalyst, without any metals or additives.
Camptothecin analogs with bulky, hydrophobic substituents at the 7-position via a Grignard reaction
作者:Govindarajan Manikumar、Randy M. Wadkins、David Bearss、Daniel D. Von Hoff、Mansukhlal C. Wani、Monroe E. Wall
DOI:10.1016/j.bmcl.2004.08.010
日期:2004.11
procedure for introduction of side chains onto the camptothecin ring system, we were able to achieve the preparation of a number of analogs bearing bulky, hydrophobic groups directly attached to the 7-position. These include 7-tert-butylcamptothecin, 7-benzylcamptothecin and the corresponding 10,11-methylenedioxycamptothecins. This method involves the reaction of an appropriate orthoaminobenzonitrile with