作者:Jianhui Huang、Peter O’Brien
DOI:10.1016/j.tetlet.2005.03.013
日期:2005.5
continuing study on the α-lithiation of N-tosyl aziridines, it is reported that ortho-lithiation of the N-tosyl group is occurring under typical α-lithiation conditions (s-BuLi/PMDETA). Thus, a simple, two-step synthesis of N-2,4,6-triisopropylbenzenesulfonyl aziridines was optimised. The route involves epoxide ring opening using a sulfonamide, mesylation and base-mediated ring closure. The scope and limitations
在上的α-锂化的持续研究Ñ甲苯磺酰氮丙啶,据报道,邻位的的-lithiation Ñ甲苯磺酰基团存在的典型的α位锂化的条件下(小号正丁基锂/ PMDETA)。因此,优化了N -2,4,6-三异丙基苯磺酰基氮丙啶的简单,两步合成。该途径涉及使用磺酰胺的环氧化物开环,甲磺酰化和碱介导的闭环。评估了这条路线的范围和局限性,并确定了五个新的N以良好的产率制备了-2,4,6-三异丙基苯磺酰基氮丙啶。由于该方法不适用于制备环辛烯氮丙啶,因此开发了另一种两步法。该方法涉及使用NBS / 2,4,6-三异丙基苯磺酰胺对环辛烯进行氨基溴化。