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1 365 666

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Application

3979463/04, 1985-11-20

(22)

Actual filing date

1985-11-20

(45)

Published

1997-01-20

(72)

Inventor

Shebelov V.A.Sorokin V.I.Granina T.E.Rusakova N.I.Kuznetsova G.V.Promonenkov V.K.Bajguzova L.V.

METHOD OF SYNTHESIS OF ORTHO-SUBSTITUTED BENZENESULFONYLISOCYANATES Russian patent published in 1997 - IPC

Abstract SU 1365666 A1

FIELD: organic chemistry, chemical technology. SUBSTANCE: product: sulfoacids, in part, ortho-substituted benzenesulfonylisocyanates of the general formula where R1-NO2, Cl, CH3, C(O)OCH3, H; R2 - H, Cl. Synthesis is carried out by phosgenation of the corresponding benzenesulfamides in the presence of tetramethylethylenediamine as catalyst and addition - hexamethylenediamine in medium of aromatic hydrocarbon, - o-xylene, p-xylene or ditolylmethane. Method ensures to decrease phosgene consumption by 2-fold, use available and low-cost catalyst and increase the yield of the end substances from 2-6% to 12-14%. Synthesized compounds are semiproducts for herbicide synthesis. EFFECT: intensified process, increased yield. 1 tbl

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SU 1 365 666 A1

Authors

Shebelov V.A.

Sorokin V.I.

Granina T.E.

Rusakova N.I.

Kuznetsova G.V.

Promonenkov V.K.

Bajguzova L.V.

Dates

1997-01-20—Published

1985-11-20—Filed

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