N-Alkylated sulfoximines have been synthesized in good yields by acylation of NH-sulfoximines followed by carbonyl reduction with complexed boranes. Enantiopure substrates react without racemization, and stereogenic centers originating from the acylating component are retained. If the acylation is performed by DCC coupling, this two-step procedure represents a rare example of a formal N-alkylation of sulfoximines under base-free conditions.
                                    N-烷基化的磺氧
亚胺通过对NH-磺氧
亚胺进行酰化,随后用复合
硼烷进行羰基还原,成功合成并获得良好产率。手性纯的底物在反应中不会发生消旋化,并且来自酰化组分的立体中心得到保留。如果酰化是通过
DCC偶联进行的,这种两步法代表了在无碱条件下磺氧
亚胺的正式N-烷基化的一个罕见例子。