Process for the production of monohaloacetylhalides

Details Process for the production of monohaloacetylhalides Process for the production of monohaloacetylhalides

1977-09-28

1978-10-31

Schwartz, Gerald A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260544Y, C07C 5158

Patent

active

041234600

ABSTRACT:
A process for the production of a monohaloacetylhalide characterized in that a ketene is reacted with a halogen in the presence of a diester of phosphonic acid of the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different alkyl or aryl, or R.sub.1 and R.sub.2 are the same or different alkyl or aryl and R.sub.3 is --COOR or --CH.sub.2 COOR, wherein R is alkyl or aryl. The diester is a solvent which impedes or prevents the formation of polyhaloacylhalides and which keeps the formation of acylhalides to a minimum.

REFERENCES:
patent: 3883589 (1975-05-01), Gash et al.

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