Process for preparing 1,2-oxa-phospholanes

Details Process for preparing 1,2-oxa-phospholanes Process for preparing 1,2-oxa-phospholanes

1976-06-11

1977-08-30

Raymond, Richard L.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260544Y, C07F 930

Patent

active

040454800

ABSTRACT:
Preparation of 2,5-dioxo-1,2-oxa-phospholanes of the formula (I) ##STR1## wherein R.sup.1 represents an optionally substituted alkyl having up to 18 carbon atoms, a cycloalkyl radical having up to 8 carbon atoms, an alkylene radical having up to 8 carbon atoms, an aryl radical having up to 14 carbon atoms which may be substituted by lower alkyl groups, lower alkoxy groups, halogen or by amino groups alkylated or dialkylated by lower alkyl groups, or an aralkyl radical having up to 15 carbon atoms which may be substituted in an analogous manner as the aryl radical, R.sup.2 represents a lower alkyl radical or hydrogen and R.sup.3 represents an alkyl radical having up to 6 carbon atoms, a phenyl radical which may be substituted by halogen or by lower alkyl groups, a benzyl radical or hydrogen, by reacting 2-halogenoformylethylphosphonic 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 represents chlorine or bromine, with approximately an equimolar quantity of water or one phosphinic-carboxylic acid of the formula (II), wherein both radicals X represent OH-groups.

REFERENCES:
patent: 2268157 (1941-12-01), Marvel
Chajrullin et al., Z. Obsc. Chim., vol. 37, (1967), p. 710.
Chajrullin et al., Z. Obsc. Chim., vol. 38, (1968), p. 288.

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