Synthesis of mono-alkyl acid phosphates with high mono-content

Chemistry of carbon compounds – Dipeptides – e.g. – aspartame – anserine – carnosine – etc.

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C07F 909

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active

041266501

ABSTRACT:
Mono-alkyl acid phosphates having the formula: ##STR1## wherein R is straight or branched alkyl having from 1 to about 25 carbon atoms, are prepared by reacting alcohol with P.sub.2 O.sub.5. The process involves suspension of P.sub.2 O.sub.5 in a heel of product comprised of a mixture of mono-alkyl acid phosphate, di-alkyl acid phosphate and free H.sub.3 PO.sub.4. Alcohol is added to the heel last, followed by mixing, and then addition of water. A mixture of mono- and dialkyl acid phosphate is obtained with a mono-content of over about 70 percent by weight.

REFERENCES:
patent: 3318982 (1967-05-01), Klose et al.
patent: 3333029 (1967-07-01), Muller-Schiedmayer et al.

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