New construction ofp-tolylsulfonyl-substituted naphthalenes by thermal and photochemical cyclization of 1-aryl-4-(methylthio)-2-(p-tolylsulfonyl)-1,3-butadienes
作者:Shoji Matsumoto、Shinjiro Takahashi、Katsuyuki Ogura
DOI:10.1002/hc.1058
日期:——
Transformation of 4-(methylthio)-1-phenyl-2-(p-tolylsulfonyl)-1,3-butadiene 1a was found to give 2-(p-tolylsulfonyl)naphthalene 3a either by the action of I2 in refluxing acetonitrile or by irradiation with a high-pressure Hg lamp. An electron-withdrawing group (p-F or p-CO2Me) on the phenyl ring retarded the thermal reaction, but the corresponding naphthalene derivative was efficiently produced by
发现 4-(甲硫基)-1-苯基-2-(对甲苯磺酰基)-1,3-丁二烯 1a 的转化得到 2-(对甲苯磺酰基)萘 3a,通过 I2 在回流乙腈中的作用或通过用高压汞灯照射。苯环上的吸电子基团(pF 或 p-CO2Me)延缓了热反应,但在 I2 存在下通过光解有效地产生了相应的萘衍生物。还报道了给电子甲氧基的取代基效应。© 2001 John Wiley & Sons, Inc. 杂原子化学 12:385–391, 2001