摘要
The reaction of ethyl esters of 4-methyl-2-oxo-2H-l-benzo (naphtho)pyran-3-carboxylic acids (1) with aromatic aldehydes in the presence of piperidine yielded4-styryl-3-carboxami-dopiperidyl coumarin derivatives 4. The reaction of hydrazine hydrate with 1gave acetophenone hydrozone derivatives 5 and acetophenone azine derivatives 6. The reaction of 1with primary amines afforded compounds 7―9. And the treatment of la with Grignard reagents afforded3-aroyl-4-methyl coumarin derivatives 10.
The reaction of ethyl esters of 4-methyl-2-oxo-2H-l-benzo (naphtho)pyran-3-carboxylic acids (1) with aromatic aldehydes in the presence of piperidine yielded4-styryl-3-carboxami-dopiperidyl coumarin derivatives 4. The reaction of hydrazine hydrate with 1gave acetophenone hydrozone derivatives 5 and acetophenone azine derivatives 6. The reaction of 1with primary amines afforded compounds 7―9. And the treatment of la with Grignard reagents afforded3-aroyl-4-methyl coumarin derivatives 10.
