作者:Nagatoshi Nishiwaki、Mitsuo Komatsu、Yoshiki Ohshiro
DOI:10.1055/s-1991-26375
日期:——
3-Cyano-2-(phenylethynyl)pyridine (1) was cyclized intramolecularly under acidic conditions to give 1,6-naphthyridin-5(6H)-one (2) and 5H-pyrano[4,3-b]pyridin-5-one (4). Pyranopyridine 4 was readily transformed to 2 or naphthyridinone 9 having an alkyl substituent at 6-position.
3-氰基-2-(苯乙炔基)吡啶(1)在酸性条件下发生分子内环化反应,生成1,6-萘啶-5(6H)-酮(2)和5H-吡喃并[4,3-b]吡啶-5-酮(4)。吡喃并吡啶4很容易转化为2或萘啶酮9,后者在6位有一个烷基取代基。