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2 189 978

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Application

2000101486/04, 2000-01-18

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Start date

2000-01-18

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Actual filing date

2000-01-18

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Published

2002-09-27

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Inventor

Pavlov P.A.

(73)

Holder

Kubanskij Gosudarstvennyj Universitet

METHOD OF SYNTHESIS OF 5-SUBSTITUTED-2-CYANO-FURANS Russian patent published in 2002 - IPC

Abstract RU 2189978 C2

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to a method of synthesis of 5-substituted-2-cyanofurans of the general formula: where R is a hydrogen or bromine atom, methyl or nitro-group. Method involves an interaction of furan aldehyde of the formula: where R has the above indicated values with hydrazonic acid in chloroform medium, at heating, in the presence of hydrated magnesium perchlorate of the formula Mg(ClO4)2•2,5H2O as a catalyst taken in the mole ratio of the corresponding furan aldehyde, hydrazonic acid and indicated catalyst = 1:1.1:1, respectively, in the range of boiling point values: on start at hydrazonic acid boiling point and then on chloroform boiling point up to nitrogen evolution ceasing. These compounds are used in synthesis of biologically active substances. EFFECT: improved and simplified method of synthesis, increased yield. 1 tbl, 3 ex

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RU 2 189 978 C2

Authors

Pavlov P.A.

Dates

2002-09-27—Published

2000-01-18—Filed

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