Palladium-Catalyzed Enantioselective C−H Olefination of Diaryl Sulfoxides through Parallel Kinetic Resolution and Desymmetrization
作者:Yu-Chao Zhu、Yan Li、Bo-Chao Zhang、Feng-Xu Zhang、Yi-Nuo Yang、Xi-Sheng Wang
DOI:10.1002/anie.201801146
日期:2018.4.23
example of PdII‐catalyzed enantioselective C−H olefination with non‐chiral or racemic sulfoxides as directing groups was developed. A variety of chiral diaryl sulfoxides were synthesized with high enantioselectivity (up to 99 %) through both desymmetrization and parallel kinetic resolution (PKR). This is the first report of PdII‐catalyzed enantioselective C(sp2)−H functionalization through PKR, and
Coenzyme NAD+ models can be applied in the photooxygenation of sulfides to sulfoxides as organocatalysts at room temperature. A series of sulfoxides are synthesized easily with this protocol and the possible mechanism is discussed. This procedure provides a reliable approach to the clean production of useful sulfoxides in synthetic chemistry.
A diphenyl ether derived bidentate secondary phosphine oxide as a preligand for nickel-catalyzed C–S cross-coupling reactions
作者:Nadeesha P. N. Wellala、Hairong Guan
DOI:10.1039/c5ob01874a
日期:——
A bidentate secondary phosphine oxide is a more effective preligand than Ph2P(O)H in nickel-catalyzed C–S cross-coupling reactions.
一种双齿次磷氧化物在镍催化的C-S交叉偶联反应中比Ph2P(O)H更有效作为前体配体。
METHOD OF MANUFACTURING SULTONIUM SALT
申请人:TOYO GOSEI CO., LTD.
公开号:US20160068477A1
公开(公告)日:2016-03-10
Provided is a sulfonium salt manufacturing method which can reduce the production of a monosulfonium salt. A method of manufacturing a sulfonium salt includes preparing a first sulfonium salt containing a sulfonium cation and a first anion, preparing a second sulfonium salt by exchanging the first anion for a halide ion, and preparing a third sulfonium salt by exchanging the halide ion for a second anion.
Polyarylene thioethers are easily prepared by an oxidative polymerization of an aromatic compound of the formula (I)
wherein R¹, R², R³ and R⁴ are each independently a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group, and Y is a hydrogen atom or a group of the formula (II)
wherein R⁵, R⁶, R⁷ and R⁸ are each independently a hydrogen atom, a halogen atom, a lower alkyl group or a lower alkoxy group and X is -O-, -S-, a methylene group or an ethylene group with a sulfidizing agent in the presence of an acid and an oxidizing agent, or in the presence of an acid, a catalyst for oxidative polymerization and oxygen, or in the presence of a Friedel-Crafts catalyst.