A novel preparation of sulfilimines from the corresponding sulfoxides using the Burgess reagent is described. The reaction is general to dialkyl- and aryl alkyl sulfoxides and proceeds under mild conditions in benzene. A variety of protecting groups can be introduced on the nitrogen of the sulfilimine by choosing the appropriate Burgess reagent.
Synthesis of Sulfoximine Propargyl Carbamates under Improved Conditions for Rhodium Catalyzed Carbamate Transfer to Sulfoxides
作者:Zhenhao Zhong、Julian Chesti、Alan Armstrong、James A. Bull
DOI:10.1021/acs.joc.2c02083
日期:2022.12.2
Sulfoximines provide aza-analogues of sulfones, with potentially improved properties for medicinal chemistry. The sulfoximine nitrogen also provides an additional vector for the inclusion of other functionality. Here, we report improvedconditions for rhodium catalyzed synthesis of sulfoximine (and sulfilimine) carbamates, especially for previously low-yielding carbamates containing π-functionality
亚砜亚胺提供了砜的氮杂类似物,具有潜在改善的药物化学特性。亚砜亚胺氮还为包含其他功能提供了额外的载体。在这里,我们报告了改进的铑催化合成亚砜亚胺(和亚硫亚胺)氨基甲酸酯的条件,特别是对于以前含有 π 功能的低产氨基甲酸酯。值得注意的是,我们报告了炔丙基亚砜亚胺氨基甲酸酯的制备,以提供炔烃作为潜在的点击手柄。使用 Rh 2 (esp) 2作为催化剂和 DOE 优化方法显着提高了产率。
An efficient imidation of thioethers with nitrene in water
作者:Tao Feng、Zhihui Tang、Xiaoli Luo、Junming Mo
DOI:10.1039/d0ob01539c
日期:——
The first imidation of thioethers with free nitrene in water was realized. N-Cbz sulfilimines are formed via imidation of thioethers with free nitrene generated from α elimination of nosyloxycarbamates. In this work, water is successfully applied as solvent for free nitrene, and transition metal catalyst is not needed.