Process for the simultaneous preparation of 2,5-dioxo-1,2-oxa-ph

Details Process for the simultaneous preparation of 2,5-dioxo-1,2-oxa-ph Process for the simultaneous preparation of 2,5-dioxo-1,2-oxa-ph

1977-03-16

1978-06-20

Schwartz, Gerald A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260545P, C07C 5158, C07F 902

Patent

active

040961826

ABSTRACT:
2,5-Dioxo-1,2-oxa-phospholanes of the formula (I) ##STR1## wherein R.sup.1 is an organic radical and R.sup.2 and R.sup.3 each also represents an organic radical or hydrogen, are prepared by reacting 2-haloformylethyl-phosphinic acid halides of the formula (II) ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 are defined as in formula (I) and X means Cl or Br, preferably Cl, with an approximatey equimolar quantity of acrylic acid. The compounds (II) may also be produced in the reaction batch and in situ by reacting about equimolar quantities of a dihalophosphine of the formula (III) ##STR3## with an .alpha.,.beta.-unsaturated acid (IV)

REFERENCES:
chajrullin et al., Z. obsc. chim. vol. 37, pp. 710, 871 (1967), vol. 38, p. 288 (1968).

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