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2 143 427

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Application

97109023/04, 1997-06-04

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Start date

1997-06-04

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Actual filing date

1997-06-04

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Published

1999-12-27

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Inventor

Urazgil'Deev N.A.Vergizov S.N.Mershin A.Ju.Shirinbekov N.I.Skorichenko N.A.Dashko D.V.Astrat'Ev A.A.Krauklish I.V.Komarov V.N.

(73)

Holder

Spetsial'Noe Konstruktorsko-Tekhnologicheskoe Bjuro Sankt-Peterburgskogo Gosudarstvennogo Tekhnologicheskogo Instituta Universiteta)

METHOD OF TETRAZOLE AND ITS SALTS SYNTHESIS Russian patent published in 1999 - IPC

Abstract RU 2143427 C1

FIELD: organic chemistry, chemistry of heterocyclic compounds. SUBSTANCE: invention relates to a method of synthesis of tetrazole and its salts that are used for synthesis of drugs, for example, for synthesis of antibiotic "Kefazol". Method involves an interaction of functionally substituted nitrile with azoimide salt in an organic solvent followed by removal of functional substituent and isolation of the end compound by the known methods. Acetone cyanohydrin is used as the functionally substituted nitrile and sodium azide is used as azoimide salt. Their interaction is carried out at 80-105 C and the functional substituent is removed by treatment with alkali to form tetrazole salt and the latter if necessary is converted to tetrazole. EFFECT: development of suitable method of synthesis of tetrazole and its salts based on available large-tonnage raw base. 2 cl, 3 ex

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RU 2 143 427 C1

Authors

Urazgil'Deev N.A.

Vergizov S.N.

Mershin A.Ju.

Shirinbekov N.I.

Skorichenko N.A.

Dashko D.V.

Astrat'Ev A.A.

Krauklish I.V.

Komarov V.N.

Dates

1999-12-27—Published

1997-06-04—Filed

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