نویسندگان : علی رضا کیاست فواد کاظمی کاظم نوربخش
H2SO4 mixed with silica gel (1:1) by weight produces a white powder which is an effective catalyst for the conversion of carbonyl compounds to their corresponding phenylhydrazones and 2,4- dintrophenylhydrazones under solvent-free conditions.
2,4-Dinitrophenylhydrazone; carbonyl compound; phenylhydrazone; protection; silica gel; solvent free; sulfuric acid
