Intramolecular redox reaction: Heating N‐alkyl, N‐allyl‐, and N‐benzyl‐substituted S‐alkenyl sulfoximines under appropriate conditions results in the formation of NH‐S‐alkyl sulfoximines. The intramolecular redox reaction involves a hydride transfer that occurs by a 6‐endo‐trig process. The intermediates in the reaction can also give access to four‐ and six‐membered heterocyclic rings and a new class
<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.
2-Sulfonimidoylylidene tetrahydrofurans and 2-sulfonimidoylylidene-5-vinyl tetrahydrofurans were readily synthesized via a consecutive acylation/SN2 sequence with total regio- and chemoselectivity from Johnson's sulfoximine derivatives. The same consecutive reaction could also be applied to the expeditious synthesis of 6-sulfonimidoylmethyl-3,4-dihydro-2H-pyrans. (C) 2009 Elsevier Ltd. All rights reserved.
Alkylation of sulfoximine and related compounds at the imino nitrogen under phase-transfer conditions