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2 074 867

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C1

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IPC

(21) (22)

Application

5047999/04, 1992-06-16

(22)

Actual filing date

1992-06-16

(45)

Published

1997-03-10

(72)

Inventor

Kuznetsov B.N.Levdanskij V.A.Shilkina T.A.Repjakh S.M.

(73)

Holder

Institut Khimii Prirodnogo Organicheskogo Syr'Ja So Ran

METHOD OF BETULIN PREPARING Russian patent published in 1997 - IPC

Abstract RU 2074867 C1

FIELD: chemical technology. SUBSTANCE: product: betulin of the formula (I) is prepared from birch bark preliminary activated under conditions of nonisobaric steam cracking at the following parameters: pressure is 2-5 MPa, temperature is 180-260 C, exposition time is 60-360 s. Structure of the formula (I) is given in description text. The end product is used in medicine, chemical and perfume industry. EFFECT: improved method of preparing.

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RU 2 074 867 C1

Authors

Kuznetsov B.N.

Levdanskij V.A.

Shilkina T.A.

Repjakh S.M.

Dates

1997-03-10—Published

1992-06-16—Filed

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