Alkenylation of C(sp<sup>3</sup>)−H Bonds by Zincation/Copper‐Catalyzed Cross‐Coupling with Iodonium Salts
作者:Chuan Liu、Qiu Wang
DOI:10.1002/anie.201713278
日期:2018.4.16
vinylphenyliodonium salts. The vinylation transformation proceeds in high efficiency and stereospecificity under mild reaction conditions. This zincative cross‐coupling reaction represents a general alkenylation strategy, which is also applicable for α‐alkenylation of esters, amides, and nitriles in the synthesis of β,γ‐unsaturated carbonyl compounds.
Novel Model Sulfur Compounds as Mechanistic Probes for Enzymatic and Biomimetic Oxidations
作者:Alicia B. Peñéñory、Juan E. Argüello、Marcelo Puiatti
DOI:10.1002/ejoc.200400382
日期:2005.1
is proposed that the mechanism of the biomimetic sulfoxidations of sulfides 1c and 2−5 by TPPFeIIICl is direct oxygen transfer. Three enzymes − Coprinus cinereus peroxidase (CiP), horseradish peroxidase (HRP) and chloroperoxidase (CPO) − were studied in the oxidation of sulfides 1a, 2, 4 and 5. The use of a racemic alkyl hydroperoxide in the CiP enzymaticoxidation of sulfides 5 and 2 yielded the corresponding
Synthesis of 2-(Trimethylsilyl)ethyl Benzenesulfenate and Benzeneselenenate and Their Reaction with Some Electrophiles in the Presence of Tetrabutylammonium Fluoride
2-(Trimethylsilyl)ethyl benzenesulfenate was allowed to react with several halides in the presence of tetrabutylammonium fluoride (TBAF) to afford the corresponding phenyl sulfoxides as the main product. In the reaction of 2-(trimethylsilyl)ethyl benzeneselenenate and several halides with TBAF, the corresponding alcohols were obtained as the main product.
A polycarbonate resin composition according to the present invention is suited to be used for medical supplies or appliances and shows a very low yellow discoloration when exposed to an ionizing radiation for sterilization. The polycarbonate resin composition comprises 100 parts by weight of a polycarbonate resin; 0.01 to 5 parts by weight of an aromatic compound containing oxy group or carbonyl group; and 0.01 to 5 parts by weight of at least one compound selected from the group consisting of: (A) a compound containing cyclic acetal group; (B) a sulfone compound; (C) a sulfoxide compound; (D) polyalkylene glycol, an ether of polyalkylene glycol or an ester of polyalkylene glycol; (E) a compound containing sulfonate group; and (F) an aromatic hydrocarbon-aldehyde resin.
Polycarbonate resin composition stabilized against radiation
申请人:MITSUBISHI ENGINEERING-PLASTICS CORPORATION
公开号:EP0794218A2
公开(公告)日:1997-09-10
The present invention relates to a polycarbonate resin composition comprising 100 parts by weight of a polycarbonate resin; 0.01 to 5 parts by weight of a compound containing oxymethylene unit, a compound containing oxymethylene unit having substituent or a cyclic ether compound having substituent.