Process for the production of diphosphaspiro compounds

Details Process for the production of diphosphaspiro compounds Process for the production of diphosphaspiro compounds

1981-08-21

1983-09-06

Sutto, Anton H.

Chemistry of carbon compounds

Dipeptides, e.g., aspartame, anserine, carnosine, etc.

260927R, 260988, C07F 940

Patent

active

044028822

ABSTRACT:
The reaction of phosphonic acid or a phosphonic acid ester of the formula II ##STR1## with a phosphonic acid dichloride of the formula III ##STR2## wherein R, R.sup.1 and R.sup.2 are as defined in claim 1, gives a phosphonic anhydride of the formula IV ##STR3## which, with or without being isolated from the reaction solution, is reacted with pentaerythritol, in the temperature range from 60.degree. to 120.degree. C., to give a compound of the formula I ##STR4## the molar ratio of anhydride of the formula IV to pentaerythritol being about 2:1.

REFERENCES:
patent: 3141032 (1964-07-01), Friedman
patent: 3391229 (1968-07-01), Cherbuliez et al.
Houben-Weyl, Band XII/1, (1963), p. 612.
Honig et al., "J. Org. Chem.", vol. 42, No. 2, (1977), pp. 379-381.
Cherbullez et al., "Helvetica Chimica Acta", vol. XLVI, Fasciculus VI, (1963), No. 275, pp. 2461-2464.

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