Bis 3-phenyl-l-pyrazolyl propane

A 250-mL, round-bottomed flask is charged with 20-30 mg of p-toluenesul-fonic acid hydrate, 100 mL of toluene, and a 1-in. egg-stirring bar. The acid 

5 The checkers found that freshly opened or freshly distilled hydrazine hydrate gave the maximum yield of high-quality product. Failure to use pure hydrazine hydrate results in contamination of the product with a gummy, orange impurity. 

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N4C21H20, 2,2-bis(3-phenyl-l-pyrazolyl) propane, 32 53 N4C22H14, 2,3-bis(2-pyridyl)-... 

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