The oxidation of the title compounds 1, 4 and 7 with dimethyldioxirane (DMD) afforded the corresponding sulfoxides 2, 5 and 8 and/or sulfones 3, 6 and 9 in good yields (Scheme 1 and 2). Excess dimethyldioxirane gave the sulfones chemoselectively without formation of the epoxides. The epoxidation of the sulfones 6a,b,d to the respective spiroepoxides 10a,b,d required the more reactive methyl(trifluoromethyl)dioxirane
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。
Hammam, Abou El-Fotooh G.; Fahmy; Amr, Abdel-Galil E., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2003, vol. 42, # 8, p. 1985 - 1993
作者:Hammam, Abou El-Fotooh G.、Fahmy、Amr, Abdel-Galil E.、Mohamed, Ashraf M.
DOI:——
日期:——
Orlov, V. D.; Nodel'man, O. A.; Mikhed'kina, E. I., Journal of general chemistry of the USSR, 1981, vol. 51, # 5, p. 969 - 974
作者:Orlov, V. D.、Nodel'man, O. A.、Mikhed'kina, E. I.