Silylmethyl-Substituted Aziridine and Azetidine as Masked 1,3- and 1,4-Dipoles for Formal [3 + 2] and [4 + 2] Cycloaddition Reactions
作者:Veejendra K. Yadav、Vardhineedi Sriramurthy
DOI:10.1021/ja055664t
日期:2005.11.30
2-tert-Butyldiphenylsilylmethyl-substituted aziridine and the corresponding azetidine reacted efficiently with nitriles and carbonyl substrates to generate imidazoline, oxazolidine, and tetrahydropyrimidine products. The azetidine rearranged efficiently to the pyrrolidine skeleton involving migration of silicon under BF3.Et2O conditions. The tert-butyldiphenylsilylmethyl function, latent to CH2OH group
2-叔丁基二苯基甲硅烷基甲基取代的氮丙啶和相应的氮杂环丁烷与腈和羰基底物有效反应,生成咪唑啉、恶唑烷和四氢嘧啶产物。氮杂环丁烷有效地重排为吡咯烷骨架,涉及在 BF3.Et2O 条件下硅的迁移。叔丁基二苯基甲硅烷基甲基官能团潜伏于 CH2OH 基团,不仅控制氮丙啶和氮杂环丁烷裂解的区域选择性,而且控制由取代的氮丙啶衍生的产物中取代基的相对立体化学。