PROCESSES FOR THE PREPARATION OF SUMATRIPTAN AND RELATED COMPOUNDS
申请人:BASF AKTIENGESELLSCHAFT
公开号:EP1226116A1
公开(公告)日:2002-07-31
[EN] PROCESSES FOR THE PREPARATION OF SUMATRIPTAN AND RELATED COMPOUNDS<br/>[FR] PROCEDES DE PREPARATION DU SUMATRIPTAN ET COMPOSES ASSOCIES
申请人:KNOLL AG
公开号:WO2001034561A1
公开(公告)日:2001-05-17
The present invention relates to a process for preparing phenylhydrazines of formula (I) in which R represents CH2SO2NHCH3, CH2CH2SO2Ph, CH2CH2SO2NHMe or a group of structure (A), (B), (C), in which a diazonium salt of formula (II) in which X represents an anion derived from hydrochloric acid, sulphuric acid, acetic acid, phosphoric acid, tetrafluoroboric acid or hydrobromic acid is reduced by a dithionite salt. The resulting phenylhydrazines can be converted to the corresponding indole derivatives by the Fischer indole synthesis.