Pyrazoles acetylene derivative

The triple bond in pyrazole derivatives gives, as do other acetylene derivatives, typical addition reactions. 

The data obtained allow us to make some generalizations for the heterocy-clization of the functionally substituted acetylenic derivatives of the benzene and pyrazole series. Studies of the heterocyclization of the functionally substituted acetylenic derivatives of substituted benzenes and pyrazoles reveal noticeable differences in their reactivities. 

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