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.