Synthetic approaches to 2-substituted 1-oxo- and 3-oxotetrahydroisoquinolines
作者:Chen-Yu Cheng、Hui-Bing Tsai、Mei-Shan Lin
DOI:10.1002/jhet.5570320113
日期:1995.1
2-Substituted homophthalimides 2a-c were reduced regioselectively with sodium borobydride to carbinol-lactam intermediates 3a-c, which were dehydrated, followed by hydrogenation, to give 1-oxo-tetrabydroisoquinolines or 3,4-dihydroisoquinolin-1(2H)ones 5a-c. The isomeric 3-oxo-tetrahydro-isoquinolines or 1,4-dihydroisoquinolin-3(2H)-ones 8a-i were obtained in satisfactory yields via heating 3-isochromanone