Fused heterocycles. 8 . 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†
作者： Albert Lévai
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摘要: 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 3-arylidenechromanones 1–6 3-arylidene-1-thiochromanones 7–12 with phenylhydrazine in hot pyridine. The structure stereochemistry compounds prepared have elucidated ir, lH 13C nmr measurements.
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