rel-(3aR,12bS)-5-Chloro-2,3,3a,12b-tetrahydro-2-methyl-1H-dibenz[2,3:6,7]oxepino[4,5-c]pyrrol-1-one is an intermediate in the synthesis of cis-Asenapine Maleate (A788045), which can be used in synthetic preparation of amines by activation of amides by chloromethylsilane and redn. with lithium aluminum hydride.