Process for manufacturing 4-chloro-2-butynyl m-chlorocarbanilate

Details Process for manufacturing 4-chloro-2-butynyl m-chlorocarbanilate Process for manufacturing 4-chloro-2-butynyl m-chlorocarbanilate

1975-11-24

1977-03-15

Myers, Jane S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C12506

Patent

active

040124339

ABSTRACT:
In the process for manufacturing 4-chloro-2-butynyl m-chlorocarbanilate (the herbicide barban) from the corresponding 4-hydroxy-2-butynyl m-chlorocarbanilate it has been discovered that yields and product quality are improved by employing dimethylformamide as reaction promoter in combination with thionyl chloride or phosgene as chlorinating agent.

REFERENCES:
patent: 3155713 (1964-11-01), Hopkins et al.
patent: 3226426 (1965-12-01), Hopkins et al.
Kittila, Dimethylformamide Chemical Uses, pp. 81-84 (1967).

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