DIPHOSPHORIC ACID COMPD. WITH-PIPERAZINE (1:1) synthesis
- Product Name:DIPHOSPHORIC ACID COMPD. WITH-PIPERAZINE (1:1)
- CAS Number:66034-17-1
- Molecular formula:C4H14N2O7P2
- Molecular Weight:264.11
110-85-0
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Yield: 46%
Reaction Conditions:
with hydrogenchloride;sodium pyrophosphate in water at 10 - 20; for 3 h;Product distribution / selectivity;
Steps:
2
In 300 g of water was dispersed 0.5 mol of sodium pyrophosphate. The dispersion was cooled to 10°C, and 1 mol of hydrochloric acid was added thereto. To the dispersion was added 0.5 mol of piperazine (purity: 97%) dissolved in 800 g of water at 20°C or lower, whereupon a white solid precipitated. The reaction system was stirred at 10°C for 3 hours. The white solid was collected by filtration and washed with water. To the filtrate was added 300 g of methanol, and the thus precipitated white solid was collected by filtration and washed with methanol and water. The combined white solid was dried to give 0.23 mol of piperazine pyrophosphate as a white powder.
References:
Asahi Denka Co., Ltd. EP1674459, 2006, A1 Location in patent:Page/Page column 6
14538-56-8
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