Tandem ring-closing metathesis–radical cyclization based on 4-(phenylseleno)butanal and methyl 3-(phenylseleno)propanoate — a route to bicyclic compounds
Direct biocatalysed synthesis of first sulfur-, selenium- and tellurium- containing <scp>l</scp>-ascorbyl hybrid derivatives with radical trapping and GPx-like properties
作者:Damiano Tanini、Beatrice Lupori、Gianni Malevolti、Moira Ambrosi、Pierandrea Lo Nostro、Antonella Capperucci
DOI:10.1039/c9cc02427a
日期:——
6-O-l-Ascorbyl selenoesters, thioesters and telluroesters can be efficiently and directly prepared from l-ascorbic acid and suitable functionalised chalcogenoesters through lipase-catalysed transesterification reactions.
Disulfides and diselenides were effectively reduced to the corresponding thiols and selenols with carbon monoxide and water using selenium.
使用硒将一氧化碳和水将二硫化物和二硒化物有效还原为相应的硫醇和硒醇。
A Simple Zinc-Mediated Method for Selenium Addition to Michael Acceptors
作者:Francesca Giulia Nacca、Bonifacio Monti、Eder João Lenardão、Paul Evans、Claudio Santi
DOI:10.3390/molecules25092018
日期:——
biphasic Zn/HCl-based reducing system. Alkenes with a variety of electron-withdrawing groups were investigated in order to gauge the scope and limitations of the process. Results demonstrated that the addition to acyclic α,β-unsaturated ketones, aldehydes, esters amides, and acids was effectively achieved and that alkyl substituents at the reactive β-centre can be accommodated. Similarly, cyclic enones
A Convenient Synthesis of ?-Phenylselenocarbonyl Compounds by In-TMSCl Promoted Cleavage of Diphenyl Diselenide and Subsequent Michael Addition
作者:Brindaban?C. Ranu、Arijit Das
DOI:10.1002/adsc.200404355
日期:2005.4
β-phenylselenocarbonyl compounds by a one-pot reaction of diphenyldiselenide and α,β-unsaturated ketones, aldehydes, esters and nitriles in the presence of indium metal-trimethylsilyl chloride under sonication. Presumably, the In-TMSCl reagent system reacts with diphenyldiselenide to form an intermediate, PhSeSiMe3, which then undergoes Michael addition with the α,β-unsaturated carbonyl compounds to produce
Reductive Cleavage of the Se–Se Bond by the Sm–Me3SiCl–H2O System: Preparation of Unsymmetrical Phenyl Selenides
作者:Lei Wang、Yongmin Zhang
DOI:10.1039/a803305f
日期:——
The reduction of diphenyl diselenide by the SmâMe3SiClâH2O system led to a selenide anion. This âlivingâ species reacted with organic halides, epoxides, α,β-unsaturated esters and α,β-unsaturated nitriles to afford unsymmetrical phenylselenides in good yields under mild and neutral conditions.