Process for the preparation of pyrazolo...

Details Process for the preparation of pyrazolo... Process for the preparation of pyrazolo...

C - Chemistry, Metallurgy

07

D

C07D 487/04 (2006.01) C07D 213/803 (2006.01) C07D 401/12 (2006.01) C07D 401/14 (2006.01)

Patent

CA 2322995

A process is provided for the preparation of compounds of formula (I) herein comprising reacting a compound of formula (II), (III) or (IV) in the presence of -OR and a hydroxide trapping agent or in the case of compounds of formula (IV) reacting in the presence of an auxiliary base and a hydroxide trapping agent (i.e. -OR is substituted by the auxiliary base), wherein X is a leaving group and R1 to R4 are as defined above.

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