Method Yield N-Acylpyrazoles R 'R2 R3 (%) lb Me Me Ph lb Me Me Ph lb Me Me Ph lb Me Me Ph 1c Me Me Me lc Me Me Me ld Me Me Et le Me Me Pr lf Me Me i-Pr lg Me Me Bu lb Me Me i-Bu lh Me Me i-Bu li Me Me s-Bu li Me Me s-Bu lj Me Me t-Bu lk Me Me CH2-t-Bu lm Me Me CH2Ph ln Me Me CH2CH2Ph 2g HH Bu