1035404-19-3Relevant articles and documents
A process for the preparation of key intermediate asenapine
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Paragraph 0029; 0033; 0034, (2017/01/31)
The invention provides a chemical synthesis method, in particular to a preparation method of a key intermediate [formula (III)] compound of asenapine capable of serving as a schizophrenia drug. In an anhydrous system, the intermediate [formula (III)] compound is obtained through dehydration of an intermediate [formula (II)] compound and anhydride under the action of a catalyst. The invention further provides a novel method for preparing asenapine by the intermediate [formula (III)]. The provided method has the advantages of simple operation, high yield, environment-friendliness, lower cost, stable technology and the like.
PROCESS FOR THE PREPARATION OF (3ARS,12BRS)-5-CHLORO-2-METHYL-2,3,3A12B-TETRAHYDRO-1HDIBENZO[2,3:6,7] OXEPINO [4,5-C]PYRROLE MALEATE AND IT'S PHARMACEUTICAL COMPOSITION THEREOF
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Page/Page column 35; 36, (2012/04/10)
The present invention relates to an improved process for the preparation (3aRS,12bRS)-5-Chloro-2-menthyl-2,3,3a,12b-tetrahydro-1Hdibenzo[2,3:6,7]oxepino [4,5-c]pyrrole maleate represented by the compound of formula-1a and its pharmaceutical composition.(F)