The present invention relates to a novel process for the preparation of trans-5-chloro-2- methyl-2,3,3a,12b- tetrahydro-1H-dibenz [2,3:6,7] oxepino[4,5-c] pyrrole (Asenapine) of formula (I). It also relates to novel intermediates i.e. 2-[(E)-2-(2-bromophenyl)ethenyl]-4-nitrophenyl acetate of formula (V), 2-[(3S,4S)-4-(2-bromophenyl)-1-methylpyrrolidin-3-yl]-4-nitrophenyl acetate of formula (VI), 2-[(3S,4S)-4-(2-bromophenyl)-1-methylpyrrolidin-3-yl]-4-nitrophenol of formula (VII), 5-nitro-2-methyl-2,3,3a,12b-tetrahydro-1H-dibenz[2,3:6,7]oxepino[4,5-c]pyrrole of formula (VIII) and 5-amino-2-methyl-2,3,3a,12b-tetrahydro-1H-dibenz[2,3:6,7]oxepino[4,5-c]pyrrole of formula (IX) are useful for the preparation of Asenapine salts of formula (I).
本发明涉及一种新型制备转-5-
氯-2-甲基-2,3,3a,12b-四氢-1H-二苯并[2,3:6,7]氧杂-4,5-环戊
吡咯烷(阿塞那平)的方法,其
化学式为(I)。本发明还涉及新型中间体,即
化学式为(V)的2-[(E)-2-(2-
溴苯基)
乙烯基]-4-
硝基苯乙酸酯,
化学式为(VI)的2-[(3S,4S)-4-(2-
溴苯基)-
1-甲基吡咯烷-3-基]-4-
硝基苯乙酸酯,
化学式为(VII)的2-[(3S,4S)-4-(2-
溴苯基)-
1-甲基吡咯烷-3-基]-
4-硝基酚,
化学式为(VIII)的5-硝基-2-甲基-2,3,3a,12b-四氢-1H-二苯并[2,3:6,7]氧杂-4,5-环戊
吡咯烷,以及
化学式为(IX)的5-
氨基-2-甲基-2,3,3a,12b-四氢-1H-二苯并[2,3:6,7]氧杂-4,5-环戊
吡咯烷,这些中间体对于制备
化学式为(I)的阿塞那平盐是有用的。