Synthesis of New Lipophilic Sulfones and Their Use in Cyclization Reactions
摘要:
Analytically pure novel dibenzylsulfanes 2a,b were synthesized by established reactions. Their oxidation by hydrogen peroxide resulted in the formation of the corresponding sulfones 3a,b, which were isolated in high yields. Analogously, the new bis-sulfone 7 was prepared starting from bis-bromo derivative 4 via bis-sulfane 6. The sulfones obtained reacted readily with bis-imidoylchlorides 8, yielding highly substituted dihydrothiophene-S,S-dioxides of type 9 and 10. Due to their vicinal amino-imino substructures, these cyclic sulfones proved to be excellent chelating ligands, exemplified by the preparation of the palladium complex 11.
Synthesis of New Lipophilic Sulfones and Their Use in Cyclization Reactions
摘要:
Analytically pure novel dibenzylsulfanes 2a,b were synthesized by established reactions. Their oxidation by hydrogen peroxide resulted in the formation of the corresponding sulfones 3a,b, which were isolated in high yields. Analogously, the new bis-sulfone 7 was prepared starting from bis-bromo derivative 4 via bis-sulfane 6. The sulfones obtained reacted readily with bis-imidoylchlorides 8, yielding highly substituted dihydrothiophene-S,S-dioxides of type 9 and 10. Due to their vicinal amino-imino substructures, these cyclic sulfones proved to be excellent chelating ligands, exemplified by the preparation of the palladium complex 11.
Alkyl Sulfides as Promising Sulfur Sources: Metal-Free Synthesis of Aryl Alkyl Sulfides and Dialkyl Sulfides by Transalkylation of Simple Sulfides with Alkyl Halides
A site‐selective metal‐free dealkylative approach to synthesize aryl alkyl and symmetrical dialkyl sulfides has been developed. This procedure is convenient and has wide functional group tolerance giving rise to sulfides carrying various alkyl chains from simple alkyl sulfides and alkyl halides in good to excellent yields. This transalkylation proceeds by an ionic mechanism via sulfonium intermediates
Indium-catalyzed Direct Conversion of Dibenzyl Ethers to Dibenzyl Sulfides Using Elemental Sulfur and a Hydrosilane and Its Application to the Preparation of Benzyl Selenides
compound, a hydrosilane and an easily handled form of elemental sulfur (S8) that effectively and directly catalyzes the sulfidation of dibenzyl ethers to produce dibenzyl sulfides. This system could also be applied to selenium in a straightforward conversion to dibenzyl selenides.
[EN] SULFUR EXTRUSION FROM DISULFIDES BY CARBENES<br/>[FR] EXTRUSION DE SOUFRE À PARTIR DE DISULFURES PAR DES CARBÈNES
申请人:UNIV HEIDELBERG
公开号:WO2021214243A1
公开(公告)日:2021-10-28
The present invention relates to a method for preparing a compound T having a thioether group from a compound D having a disulfide group in the presence of a carbene.
N‐Heterocyclic Carbene Mediated Sulfur Extrusion of Disulfides
作者:Alexander P. Galow、Frank Rominger、Michael Mastalerz
DOI:10.1002/ejoc.202201383
日期:2023.2.13
N-heterocyclic carbenes can be used to substitute the highly carcinogenic aminophosphines to extrude sulfur from disulfides from thioethers (here R=aryl). Furthermore, pharmaceutically more interesting compounds such as cystine can be transformed to lanthionine.
N-杂环卡宾可用于替代高度致癌的氨基膦,以从硫醚(此处 R = 芳基)的二硫化物中挤出硫。此外,药学上更有趣的化合物如胱氨酸可以转化为羊毛硫氨酸。
SULFUR EXTRUSION FROM DISULFIDES BY CARBENES
申请人:Universität Heidelberg
公开号:EP3901135A1
公开(公告)日:2021-10-27
The present invention relates to a method for preparing a compound T having a thioether group from a compound D having a disulfide group in the presence of a carbene.