Process for preparing 2-phenyl-3-naphthylpropionic acid...

C - Chemistry – Metallurgy – 07 – D

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C07D 207/12 (2006.01) C07C 253/30 (2006.01) C07C 255/50 (2006.01) C07C 255/52 (2006.01)

Patent

CA 2264933

A process for preparing compounds represented by general formulae (5) and (6) in the following reaction scheme or salts thereof, wherein R1 represents a nitrogen protective group; R2 represents a methanesulfonyl or p- toluenesulfonyl group; R3 represents a hydrogen atom, an aralkyl group, or an alkyl group having 1 to 6 carbon atoms, and X represents a halogen atom. The above process is useful as a commercial process for preparing intermediates of anticoagulant aromatic amidine derivatives described in Japanese Patent Laid- Open No. 208946/1993.

Cette invention se rapporte à un procédé pour préparer des composés représentés par les formules générales (5) et (6) dans le schéma de réaction suivant ou à des sels de ces composés. Dans ce schéma de réaction, R?1¿ représente un groupe protecteur d'azote; R?2¿ représente un groupe métanesulfonyle ou p-toluènesulfonyle; R?3¿ représente un atome d'hydrogène, un groupe aralkyle ou un groupe alkyle ayant 1 à 6 atomes de carbone, et x représente un atome d'halogène. Ce procédé est utile comme procédé commercial dans la préparation d'intermédiaires de dérivés d'amidine aromatiques anti-coagulants, décrits dans le brevet japonais rendu public sous le no. 208946/1993.

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