Fused Heterocycles. 8 [1]. An Efficient Procedure for the Stereoselective Synthesis of trans-2,3,3a,4-Tetrahydro-3-aryl-2-phenyl[1]benzopyrano[4,3-c]pyrazoles and their [1]Benzothiopyrano Analogues

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Abstract

Stereoselective synthesis of trans-2,3,3a,4-tetrahydro-3-aryl-2-phenyl[1]benzopyrano[4,3-c]pyrazoles 13-18 and their [1]benzothiopyrano analogues 19-24 has been performed by the reaction of 3-aryl-idenechromanones 1-6 and 3-arylidene-1-thiochromanones 7-12 with phenylhydrazine in hot pyridine. The structure and stereochemistry of the compounds prepared have been elucidated by ir, 1H and 13C nmr measurements.

Original languageEnglish
Pages (from-to)13-16
Number of pages4
JournalJournal of Heterocyclic Chemistry
Volume35
Issue number1
Publication statusPublished - 1998

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Pyrazoles
Stereochemistry
pyridine
phenylhydrazine

ASJC Scopus subject areas

  • Organic Chemistry

Cite this

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title = "Fused Heterocycles. 8 [1]. An Efficient Procedure for the Stereoselective Synthesis of trans-2,3,3a,4-Tetrahydro-3-aryl-2-phenyl[1]benzopyrano[4,3-c]pyrazoles and their [1]Benzothiopyrano Analogues",
abstract = "Stereoselective synthesis of trans-2,3,3a,4-tetrahydro-3-aryl-2-phenyl[1]benzopyrano[4,3-c]pyrazoles 13-18 and their [1]benzothiopyrano analogues 19-24 has been performed by the reaction of 3-aryl-idenechromanones 1-6 and 3-arylidene-1-thiochromanones 7-12 with phenylhydrazine in hot pyridine. The structure and stereochemistry of the compounds prepared have been elucidated by ir, 1H and 13C nmr measurements.",
author = "A. L{\'e}vai",
year = "1998",
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AB - Stereoselective synthesis of trans-2,3,3a,4-tetrahydro-3-aryl-2-phenyl[1]benzopyrano[4,3-c]pyrazoles 13-18 and their [1]benzothiopyrano analogues 19-24 has been performed by the reaction of 3-aryl-idenechromanones 1-6 and 3-arylidene-1-thiochromanones 7-12 with phenylhydrazine in hot pyridine. The structure and stereochemistry of the compounds prepared have been elucidated by ir, 1H and 13C nmr measurements.

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