A mild and efficient synthesis of 4-aryl-quinolin-2(1H)-ones via a tandem amidation/Knoevenagel condensation of 2-amino-benzophenones with esters or lactones
摘要:
Using LiHMDS as the base, a tandem amidation/Knoevenagel condensation of 2-aminobenzophenones with alpha-methylene esters or lactones gives 4-aryl-quinolin-2(1H)-ones in 65-96% yield. This method is mild, highly efficient, and amenable to scaleup. (C) 2003 Elsevier Science Ltd. All rights reserved.
A mild and efficient synthesis of 4-aryl-quinolin-2(1H)-ones via a tandem amidation/Knoevenagel condensation of 2-amino-benzophenones with esters or lactones
作者:Jianji Wang、Robert P. Discordia、Gerard A. Crispino、Jun Li、John A. Grosso、Richard Polniaszek、Vu C. Truc
DOI:10.1016/s0040-4039(03)00889-x
日期:2003.5
Using LiHMDS as the base, a tandem amidation/Knoevenagel condensation of 2-aminobenzophenones with alpha-methylene esters or lactones gives 4-aryl-quinolin-2(1H)-ones in 65-96% yield. This method is mild, highly efficient, and amenable to scaleup. (C) 2003 Elsevier Science Ltd. All rights reserved.
Selective removal of a benzyl protecting group in the presence of an aryl chloride under gaseous and transfer hydrogenolysis conditions
作者:Jun Li、Steve Wang、Gerard A Crispino、Karen Tenhuisen、Ambarish Singh、John A Grosso
DOI:10.1016/s0040-4039(03)00846-3
日期:2003.5
Selectiveremoval of a benzyl protecting group in the presence of an aryl chloride using Pd/C under gaseous and transfer hydrogenolysis conditions is described. The addition of chloride salts to the debenzylation reaction provides excellent selectivity.