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.
DOI:——
日期:——
Intermolecular Reductive Cyclodimerization of Cyclic α,β-Unsaturated Ketones Promoted by a Low-Valent Titanium Reagent: A Facile Synthesis of Some New Spiro Compounds
作者:Da-Qing Shi、Guo-Lan Dou、Zheng-Yi Li、Chun-Ling Shi、Xiao-Yue Li、Hong Jiang、Sai-Nan Ni、Shun-Jun Ji
DOI:10.1055/s-2007-983707
日期:2007.6
β-unsaturated ketones such as 2-benzylideneindan-1-ones, 2-benzylidene-1 -tetralones, 3-benzylidenechroman-4-ones, and 3-benzylidenethiochroman-4-ones induced by a low-valent titanium reagent were studied. Some new spiro compounds were prepared in good yields under neutral and mild conditions. High stereoselectivity was achieved and the stereochemistry of the products was confirmed by X-ray diffraction
α,β-不饱和酮如 2-benzylideneindan-1-ones、2-benzylidene-1-tetralones、3-benzylidenechroman-4-ones 和 3-benzylidenethiochroman-4-ones 的分子间还原环二聚反应对低价钛试剂进行了研究。一些新的螺环化合物在中性和温和条件下以高收率制备。实现了高立体选择性,并通过 X 射线衍射分析证实了产物的立体化学。