Patent ID: 7223860
Filing Date: 2007-05-29
Classification: C07B,C07C,C07D

Abstract:
1. A process for the preparation of a compound, in the enantiomerically pure form, in the form of a mixture of diastereoisomers or in the racemic form, of formula: in which X represents a halogen atom and R 1 represents a benzyl group, a tert-butyloxycarbonyl group or an α-methylbenzyl group, of its optional salts with inorganic or organic acids, is prepared by cyclization of a compound, in the enantiomerically pure form, in the form of a mixture of diastereoisomers or in the racemic form, of formula: in which X and R 1 are as defined for a compound of formula (II), and, optionally, the compound of formula (II) thus obtained is converted to one of its salts.