Process for preparing equimolecular salt of piperazine and 1,2-d

Details Process for preparing equimolecular salt of piperazine and 1,2-d Process for preparing equimolecular salt of piperazine and 1,2-d

1974-11-20

1976-08-24

Rollins, Alton D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260268R, 424250, C07D40300, C07D40304

Patent

active

039766462

ABSTRACT:
The equimolecular salt of piperazine and 1,2-diphenyl-4-butyl-3,5-dioxopyrazolidine is prepared by stirring together separately prepared solutions of the two compounds in the same organic solvent, selected among the ketones, ethers, toluene and chlorinated aliphatic hydrocarbons containing 1 to 3 carbon atoms and by seeding the reaction mixture by means of crystals of the equimolecular salt when temperature of the reaction mixture has decreased to a value at which the seeding crystals are not dissolved in said mixture and before any precipitate appears in said reaction mixture.

REFERENCES:
camille Beaudet, Chemical Abstracts, vol. 78, p. 84443t (1973).

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