Title:
MANUFACTURE OF 1*11DICHLOROALKENE
Document Type and Number:
Japanese Patent JPS5616428
Kind Code:
A
Abstract:
A process for the preparation of a 1,1-dichloroalkene of the formula in which R1 is hydrogen or an optionally substituted alkyl, alkenyl, alkynyl, aralkyl or aryl radical, and R2 is an optionally substituted alkyl, alkenyl, alkynyl, aralkyl, aralkenyl or aryl radical, or cycloalkyl which is optionally substituted by halogen, alkyl, alkanoyl, carbamoyl, cyano or phenyl, or R1 and R2 together form a hydrocarbon chain which is optionally branched and/or optionally contains a fused benzene ring, comprising reacting an aldehyde or ketone of the formula with a dichloromethane-phosphonic acid ester of the formula in which R3 each independently is alkyl or phenyl or the two radicals R3 together are alkanediyl, in the presence of a base at a temperature between about -50 DEG and +50 DEG C. Preferably either the base is metered into a mixture of the aldehyde or ketone and phosphonic acid ester or the ester is added to a mixture of the base and aldehyde or ketone.
Inventors:
HERUMUUTO HOFUMAN
FURITSUTSU MAURERU
UUBUE PURIISUNITSUTSU
HANSUUYOOHAMU RIIBERU
FURITSUTSU MAURERU
UUBUE PURIISUNITSUTSU
HANSUUYOOHAMU RIIBERU
Application Number:
JP9820180A
Publication Date:
February 17, 1981
Filing Date:
July 19, 1980
Export Citation:
Assignee:
BAYER AG
International Classes:
C07B31/00; C07B37/04; C07C1/34; C07C17/00; C07C17/26; C07C17/263; C07C21/073; C07C21/19; C07C22/00; C07C22/04; C07C25/28; C07C45/00; C07C45/41; C07C45/54; C07C45/68; C07C49/355; C07C49/557; C07C49/567; C07C62/18; C07C67/00; C07C253/00; C07C255/48; C07F9/40; C07F9/42; (IPC1-7): C07B27/00; C07C17/26; C07C45/67; C07C49/557; C07C121/48