Diastereoselectivity in the Diels-Alder reactions of thio aldehydes
作者:Edwin. Vedejs、J. S. Stults、R. G. Wilde
DOI:10.1021/ja00224a033
日期:1988.8
La reaction de Diels-Alder de thioaldehydes avec le cyclopentadiene produit preferentiellement l'isomere endo. La selectivite la plus elevee est obtenue avec les thioaldehydes RCHS ou R est un groupe alkyle encombrant tel que t-butyl ou isopropyl
La 反应 de Diels-Alder de thioaldehydes avec le cyclopentadiene produitpreferentiellement l'isomere end。La selectivite la plus elevee est obtenue avec les 硫醛 RCHS ou Rest un groupe 烷基化 tel que t-丁基 ou 异丙基
Thiol-free chemoenzymatic synthesis of β-ketosulfides
作者:Adrián A Heredia、Martín G López-Vidal、Marcela Kurina-Sanz、Fabricio R Bisogno、Alicia B Peñéñory
DOI:10.3762/bjoc.15.34
日期:——
A preparation of β-ketosulfides avoiding the use of thiols is described. The combination of a multicomponent reaction and a lipase-catalysed hydrolysis has been developed in order to obtain high chemical diversity employing a single sulfur donor. This methodology for the selective synthesis of a set of β-ketosulfides is performed under mild conditions and can be set up in one-pot two-step and on a
Stevens rearrangement of thioethers with arynes: a facile access to multi-substituted β-keto thioethers
作者:Xiao-Bo Xu、Zi-Hua Lin、Yuyin Liu、Jian Guo、Yun He
DOI:10.1039/c7ob00277g
日期:——
An effective method for the synthesis of multi-substituted β-keto thioethers via Stevens rearrangement of simple β-keto thioethers with arynes has been developed. In these reactions, successive C–S/C–H/C–C bonds were formed in one pot under mild and transition-metal free conditions to afford multi-substituted β-keto thioethers in moderate to good yields.
An Efficient and Odorless Synthesis of Thioethers Using 2-[Bis(alkylthio)methylene]-3-oxo-N-o-tolylbutanamides as Thiol Equivalents
作者:Haifeng Yu
DOI:10.1002/cjoc.201100096
日期:2012.2
Using 2‐[bis(alkylthio)methylene]‐3‐oxo‐N‐o‐tolylbutanamides 1 as odorlessthiolequivalents, an efficient and odorlesssynthesis of thioethers has been developed. Promoted by NaOH in EtOH, the cleavage of 1 commences to generate thiolate anions, and the generated thiolate anions then react with halides to give various thioethers in good yield. It is noteworthy that only a very faint odor of thiols
NaOH-Promoted Thiolysis of Oxiranes Using 2-[Bis(alkylthio)methylene]-3-oxo-<i>N</i>-<i>o</i>-tolylbutanamides as Odorless Thiol Equivalents
作者:Dewen Dong、Qun Liu、Haifeng Yu、Yan Ouyang、Yan Wang
DOI:10.1055/s-2006-958438
日期:2007.1
A convenient and efficient protocol for the thiolysis of oxiranes using2-[bis(alkylthio)methylene]-3-oxo-N-o-tolylbutan-amides as thiolequivalents has been developed. Promoted by sodium hydroxide (NaOH) in ethanol at room temperature, the cleavage commences and the generated thiolate anions undergo nucleophilic addition in situ. β-Hydroxy sulfides were obtained in high yields along with good (3-regioselectivity