3]benzothiazolein low yields. When irradiation is performed in the presence of methyl acrylate or various enol ethers, aziridination of the double bond is observed, with good yields in the case of enol ethers. Among these, 1-(6-methyl-3,4-dihydro-2H-pyran-2-yl)ethanone undergoes aziridination with complete diastereoselectivity to give the (1RS,3RS,6SR) diastereomer.(© Wiley-VCH Verlag GmbH & Co. KGaA
直接照射 2-
叠氮基-1,3-
噻唑和 2-
叠氮基-1,3-
苯并噻唑在
甲苯溶液中的
叠氮-
四唑互变异构体的混合物,产生由中间体氮烯产生的产物,后者反过来在2-
叠氮基-1,3-
噻唑生成聚合物,2-
叠氮基-1,3-
苯并噻唑二聚生成[1,3]
苯并噻唑并[2',3':3,4] [1,2,4,5]四氮杂[6,1b][1,3]
苯并噻唑收率低。当在
丙烯酸甲酯或各种烯醇醚存在下进行辐照时,观察到双键的
氮丙啶化,在烯醇醚的情况下具有良好的产率。其中,1-(6-methyl-3,4-dihydro-2H-pyran-2-yl)ethanone 以完全非对映选择性进行
氮丙啶化,得到 (1RS,3RS,6SR) 非对映异构体。 (© Wiley-
VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)