Fused heterocycles.<b>8</b>. An efficient procedure for the stereoselective synthesis of<i>trans</i>-2,3,3a,4-tetrahydro-3-aryl-2-phenyl[1]benzopyrano[4,3-<i>c</i>]pyrazoles and their [1]benzothiopyrano analogues
作者:Albert Lévai
DOI:10.1002/jhet.5570350103
日期:1998.1
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-arylidenechromanones 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, lH and 13C nmr measurements
的立体选择性合成反式-2,3,3a,4-四氢-3-芳基-2-苯基[1]苯并吡喃并[4,3- c ^ ]吡唑13-18和它们的[1]苯并噻喃并类似物19-24已被执行通过在热吡啶中3-芳基苯并二氢杂蒽酮1-6和3-芳基-1-硫代并苯并二氢杂苯并酮7-12与苯肼反应。通过ir,l H和13 C nmr测量已经阐明了所制备化合物的结构和立体化学。