[EN] PROCESS FOR THE PREPARATION OF PYRIDINYL AND PYRIMIDINYL MONO-FLUORINATED BETA KETO ESTERS<br/>[FR] PROCEDE DE FABRICATION DE PYRIDINYL ET PYRIMIDINYL BETA-CETO-ESTERS FLUORES
申请人:SANOFI SYNTHELABO
公开号:WO2004078725A1
公开(公告)日:2004-09-16
The present invention relates to a process for preparing pyridinyl and pyrimidinyl mono-fluorinated beta keto esters of formula (I), wherein: R1 represents a pyridine ring or a pyrimidine ring, the rings being optionally substituted by a C3-6 cycloalkyl group, a C1-4 alkyl group, a C1-4 alkoxy group, a benzyl group or a halogen atom; R2 represents a hydrogen atom, a C1-6 alkyl group or a halogen atom; and R3 represents a C1-6 alkyl group; by reacting with fluorine a compound of formula (II), wherein R1, R2 and R3 have the same meaning as defined above. Pyridinyl and pyrimidinyl mono-fluorinated beta keto esters of formula (I).