<i>N</i>-Alkylations of<i>N</i>H-Sulfoximines and<i>N</i>H-Sulfondiimines with Alkyl Halides Mediated by Potassium Hydroxide in Dimethyl Sulfoxide
作者:Christine M. M. Hendriks、Rebekka A. Bohmann、Marina Bohlem、Carsten Bolm
DOI:10.1002/adsc.201400193
日期:2014.5.26
A general method for the N‐alkylation of NH‐sulfoximines and NH‐sulfondiimines has been developed, employing alkyl bromides with KOH in DMSO at room temperature. A variety of previously inaccessible N‐alkylated sulfoximines and sulfondiimines was prepared in good to excellent yields (up to 97%). As an application, the conditions were used to access the biologically active Suloxifen.
Access to sulfondiimines: The oxidative one‐pot chlorination–imination sequence of in situ generated freesulfilimines by N‐chlorosuccinimide (NCS) allows the preparation of N‐monosubstituted sulfondiimines under mild reaction conditions with excellent functional‐group tolerance (see scheme; Mes=2,4,6‐trimethylphenylsulfonyl)
获得磺胺二亚胺:N-氯代琥珀酰亚胺(NCS)对原位生成的游离亚砜亚胺进行氧化一锅加氯-亚胺化反应,可以在温和的反应条件下以优异的官能团耐受性制备N-单取代的磺胺二亚胺(见方案; Mes = 2,4,6-三甲基苯基磺酰基)