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
2-取代的邻苯二甲
酰亚胺2a-c用
硼氢化钠区域选择性还原为
甲醇-内酰胺中间体3a-c,将其脱
水,然后氢化,得到1-氧代-
四氢异喹啉或
3,4-二氢异喹啉-1(2 H)酮5a-c。同分异构的3-氧代-四氢-
异喹啉或1,4-二氢
异喹啉-3(2 ħ) -酮8A-I是在令人满意的产率得到经加热3-
异色满酮(6与相应的胺)7A-I中的存在
氯化铝。