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1 401 842

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A1

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IPC

(21) (22)

Application

4069511/04, 1986-05-20

(22)

Actual filing date

1986-05-20

(45)

Published

1995-02-27

(72)

Inventor

Bakibaev A.A.Tignibidina L.G.Pechenkin A.G.Filimonov V.D.Bakibaev A.A.

METHOD OF SYNTHESIS OF DIPHENYLMETHYLUREAS Russian patent published in 1995 - IPC

Abstract SU 1401842 A1

FIELD: organic chemistry, urea derivatives. SUBSTANCE: synthesis is carried out from corresponding derivatives of diphenylmethane and urea in the presence of mineral acid - concentrated H2SO4 in the medium of organic solvent - CH3COOH at 70-95 C at molar ratio diphenylmethane derivative: urea derivative: H2SO4: CH3COOH = 1:(51-77):(51-77):2.2. Diphenylcarbinol is used as diphenylmethane derivative. The yield of the end diphenylureas is up to 92% , period process is 3-4 h, temperature is decreased from 135-140 C to 70-95 C, diphenylmethylcarbinol is available reagent. EFFECT: simplified process. 4 tbl

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SU 1 401 842 A1

Authors

Bakibaev A.A.

Tignibidina L.G.

Pechenkin A.G.

Filimonov V.D.

Bakibaev A.A.

Dates

1995-02-27—Published

1986-05-20—Filed

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