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The 1,1-dimethyl-3-butenylhydrazine oxalate (2 g) was dissolved in toluene and neutralized with 50% aqueous sodium hydroxide. To this solution was added benzoyl chloride (2.8 g) and sodium hydroxide (50% Aq. solution) (3.2 g) at 25° C. The reaction mixture was warmed to room temperature and stirred. The mixture was diluted with hexane and filtered to afford an oily product which solidified upon standing: m.p. 105 °-112° C.

1. filtrationfiltered
2. customto afford an oily product which