Pyrazoles by a Consecutive 3CR of Hetero aryl Halides, Propargyl Alcohols, and Hydrazines

1 Pyrazoles by a Consecutive 3CR of (Hetero)aryl Halides, Propargyl Alcohols, and Hydrazines 

upon CIR of electron-deficient (hetero)aryl halides 11 and phenyl propargyl alcohol 12a, and subsequent addition of a hydrazine (29b) (R = Me) 3,5-disubstituted 

89e (EWG-n = P-O2NC5H4, (hetero)aryl = p-MeOC5H4, R = m-BrC5H4, 50%) 891 (EWG-H =p-02NC5H4, (hetero)aryl = p-BrC5H4, R = 2-thlenyl, 56%) 

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