Process for preparing the piperazine salt of 2,5-dihydroxybenzen

Details Process for preparing the piperazine salt of 2,5-dihydroxybenzen Process for preparing the piperazine salt of 2,5-dihydroxybenzen

1990-07-25

1992-01-21

Shen, Cecilia

Organic compounds -- part of the class 532-570 series

Organic compounds

Nitrogen attached directly or indirectly to the purine ring...

544403, 544410, C07D29500, C07C30332

Patent

active

050829416

ABSTRACT:
The process is characterized in that the diethylamine salt or the ammonium salt of 2,5-dihydroxybenzenesulphonic acid is used as starting material, which salt is tosylated in an ammoniacal medium to lead in both cases to the production of the ammonium salt of 2,5-dihydroxybenzenesulphonic acid monotosylate, which in its turn is converted initially to the corresponding piperazine disalt which is separated in an aqueous medium, and finally in an aqueous-alcoholic medium the piperazine salt of 2,5-dihydroxybenzenesulphonic acid monotosylate, also known as piperazine sultosylate, is obtained.
Medicinal applications.

REFERENCES:
patent: 3954767 (1976-05-01), Esteve-Subirana
patent: 4115648 (1978-09-01), Esteve-Subirana

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