Patent ID: 11958858
Assignee: ZHEJIANG AUSUN PHARMACEUTICAL CO., LTD.
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 3:
4. The method for preparing Asenapine of formula I according to claim 3, characterized in that, in said step (a-1), the base used is selected from LiOH, NaOH, KOH, RbOH, CsOH, FrOH, Li2CO3, Na2CO3, K2CO3, Rb2CO3, Cs2CO3, LiHCO3, NaHCO3, KHCO3, NaH, KH, CaH2, butyl lithium, methyl magnesium chloride, tert-butyl magnesium chloride, ethyl magnesium bromide, butyl magnesium bromide, LDA, LiHMDS or NaHMDS.