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1 504 981

(13)

A1

(51)

IPC

(21) (22)

Application

4183185/04, 1987-01-16

(22)

Actual filing date

1987-01-16

(45)

Published

1997-01-10

(72)

Inventor

Sorokin V.I.Kuznetsova G.V.Granina T.E.Rusakova N.I.Tsybalova L.A.Melikhova I.N.

METHOD FOR PRODUCTION OF ORTHO-SUBSTITUTED BENZENESULFONYL ISOCYANATES Russian patent published in 1997 - IPC

Abstract SU 1504981 A1

FIELD: organic chemistry, production of herbicides. SUBSTANCE: desired products are prepared by interaction of benzenesulfamides having common formula $$$ (where $$$ is Cl, $$$ and $$$ is H, Cl) with chloride of oxalic acid. The process is carried out in aromatic hydrocarbon or in aromatic hydrocarbon being substituted by halide in the presence of catalyst at 90-100 C. Tetramethyl ethylene diamine is used as mentioned above catalyst. Yield of desired product is 90-96 %. EFFECT: increases yield of desired product. 1 tbl

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SU 1 504 981 A1

Authors

Sorokin V.I.

Kuznetsova G.V.

Granina T.E.

Rusakova N.I.

Tsybalova L.A.

Melikhova I.N.

Dates

1997-01-10—Published

1987-01-16—Filed

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