Bisphosphinic acid anhydrides and process for their preparation

Details Bisphosphinic acid anhydrides and process for their preparation Bisphosphinic acid anhydrides and process for their preparation

1979-02-07

1980-04-01

Morgenstern, N.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260932, 260934, C07F 930

Patent

active

041961412

ABSTRACT:
Bisphosphinic acid anhydrides of the formula ##STR1## in which R is a saturated open chain or cyclic alkylene radical, an arylene or aralkylene radical, and R.sup.1 and R.sup.2, which may be identical or different, represent optionally halogen substituted alkyl, aryl or aralkyl radicals, and m represents an integer .gtoreq.1, preferably .gtoreq.2 and a process for their preparation which comprises reacting bisphosphinic acid derivatives of the formula ##STR2## in which R.sup.3 and R.sup.4, are hydrogen, monovalent cations, the ammonium group or optionally halogen-substituted alkyl groups, with inorganic acid chlorides and/or with phosgene and/or with oxalyl chloride and/or with the corresponding bromine compounds in a molar ratio of about 1:1 at a temperature up to 250.degree. C.

REFERENCES:
patent: 3639473 (1972-02-01), Venezky
patent: 3689548 (1972-09-01), Maier
Michaelis et al., "Ber," Jahreg VII, p. 1070 (1874).
Kosolapoff et al., "J.A.C.S." 73:4101 (1951).
Moedritzer, "J.A.C.S.," 83:4381 (1961).

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