Nucleophile-Dependent Regio- and Stereoselective Ring Opening of 1-Azoniabicyclo[3.1.0]hexane Tosylate
作者:Mi-Kyung Ji、Dietmar Hertsen、Doo-Ha Yoon、Heesung Eum、Hannelore Goossens、Michel Waroquier、Veronique Van Speybroeck、Matthias D'hooghe、Norbert De Kimpe、Hyun-Joon Ha
DOI:10.1002/asia.201301551
日期:2014.4
.1.0]hexane tosylate was generated as a stable bicyclic aziridinium salt from the corresponding 2‐(3‐hydroxypropyl)aziridine upon reaction with p‐toluenesulfonyl anhydride. This bicyclic aziridinium ion was then treated with various nucleophiles including halides, azide, acetate, and cyanide in CH3CN to afford either piperidines or pyrrolidines through regio‐ and stereoselective ring opening, mediated
在与对甲苯磺酰基反应后,由相应的2-(3-羟丙基)氮丙啶生成了稳定的1-[((1 R)-(1-苯基乙基)]-1-氮杂双环[3.1.0]己烷甲苯磺酸盐,为稳定的双环叠氮鎓盐。酐。然后用CH 3 CN中的各种亲核试剂(包括卤化物,叠氮化物,乙酸盐和氰化物)处理该双环叠氮鎓离子,通过区域和立体选择性开环获得哌啶或吡咯烷,这取决于所应用亲核试剂的特性。根据DFT计算,在热力学控制下的开环反应会生成哌啶,而在动力学控制下的反应会生成哌啶和吡咯烷,具体取决于这两种途径的活化能。