与最近在氮酰化催化方法学发展中取得的重大进展相反,N-酰基亚磺酰亚胺的合成进展缓慢,并且仍然主要依赖于化学计量的活化剂的使用。在这里,我们描述了由具有B 3 NO 2环系统的杂环催化剂促进的磺酰亚胺中的氮原子与羧酸的直接酰化作用。使用被发现协议是操作简单并且能够耐受宽范围的官能团,家具的Ñ酰化的亚砜亚胺,收率良好。该多硼催化剂驯服了以前难以处理的氮亲核试剂,通过在同一反应罐中催化两个连续的氮酰化反应,可以短暂合成因子Xa抑制剂。
mild reaction condition, photocatalyst promotes the direct cross coupling of NH-sulfoximines with benzyl bromide to form N-benzylation sulfoximines. Superbases which are usually used in reported coupling of NH-sulfoximines with alkyl halides are not needed in this work. This method is also suitable for the synthesis of N-allyl sulfoximines.
Lewis acid triggered <i>N</i>-alkylation of sulfoximines through nucleophilic ring-opening of donor–acceptor cyclopropanes: synthesis of γ-sulfoximino malonic diesters
作者:Satish G. More、Gurunath Suryavanshi
DOI:10.1039/d2ob00213b
日期:——
triflate (Sc(OTf)3) catalyzed, mild, and regioselective ring-opening reaction of donor–acceptor (D–A) cyclopropanes has been developed using sulfoximines for the synthesis of γ-sulfoximino malonic diesters. This protocol allows the synthesis of different N-alkyl sulfoximines in good to excellent yields (up to 94%) with broad functional group tolerance. In this process, N–H and C–C bonds are cleaved
Visible-Light-Induced One-Pot Cross Coupling of <i>NH</i>-Sulfoximines with Toluene
作者:Jingru Dong、Qiumei Su、Dongyan Li、Junming Mo
DOI:10.1021/acs.orglett.2c03575
日期:2022.11.18
NH-sulfoximines with toluene was realized by visible light-induced catalysis. The relatively inert toluene and sulfoximines were activated under mild conditions, and the functionalized sulfoximines were obtained via selective cross coupling. The reaction proceeded via consecutive steps including generation of the sulfoximine radical by visible-light catalysis, activation of toluene via hydrogen atom transfer
Rhodium-Catalyzed Enantioselective N-Allylation of Sulfoximines
作者:Yang-yang Li、Bing Gao
DOI:10.1021/acs.orglett.3c00414
日期:2023.4.28
The N-functionalization of free sulfoximines is an important approach to modifying their chemical and biological properties for downstream applications. Here, we report a rhodium-catalyzed N-allylation of free sulfoximines (═NH) with allenes under mild conditions. The redox-neutral and base-free process enables chemo- and enantioselective γ-hydroamination of allenes and gem-difluoroallenes. Synthetic