Faujasites such as HY, CaY and MgY are employed as solid acid catalysts for the clean and less hazardous preparation of phenylhydrazone, 2,4-dinitrophenylhydrazone as well as 1,3-dithiane derivatives of carbonyl compounds. The reactions proceed very smoothly and the yields of the derivatives are excellent.
A. Lalitha, K. Pitchumani and C. Srinivasan, Green Chem., 1999, 1, 173 DOI: 10.1039/A902533B
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