Ni(II) Precatalysts Enable Thioetherification of (Hetero)Aryl Halides and Tosylates and Tandem C−S/C−N Couplings
作者:M. Trinidad Martín、Mario Marín、Celia Maya、Auxiliadora Prieto、M. Carmen Nicasio
DOI:10.1002/chem.202101906
日期:2021.8.25
(hetero)arylhalides, including challenging aryl chlorides, with a variety of aromatic and aliphatic thiols. Aryl and alkenyl tosylates are also well tolerated, demonstrating, for the first time, to be competent electrophilic partners in Ni-catalyzed C−S bond formation. The chemoselective functionalization of the C−I bond in the presence of a C−Cl bond allows for designing site-selective tandem C−S/C−N
Chan–Lam-Type C–S Coupling Reaction by Sodium Aryl Sulfinates and Organoboron Compounds
作者:Long Yin Lam、Cong Ma
DOI:10.1021/acs.orglett.1c02299
日期:2021.8.6
A Chan–Lam-type C–S coupling reaction using sodium aryl sulfinates has been developed to provide diaryl thioethers in up to 92% yields in the presence of a copper catalyst and potassium sulfite. Both electron-rich and electron-poor sodium aryl sulfinates and diverse organoboron compounds were tolerated for the synthesis of aryl and heteroaryl thioethers and dithioethers. The mechanistic study suggested
SULFONIUM SALT, PHOTOACID GENERATOR, PHOTOCURABLE COMPOSITION, AND CURED PRODUCT THEREOF
申请人:SAN-APRO LTD.
公开号:US20190300476A1
公开(公告)日:2019-10-03
A sulfonium salt is formed of a sulfonium cation selected from a group indicated by general formulas (1), (2), and (3) and a gallate anion represented by formula (a). A photoacid generator is characterized in that said sulfonium salt is contained therein. An energy-ray curable composition contains the acid generator and a cationic polymerizable compound. A cured product is formed by curing these substances.
Preventing Pd–NHC bond cleavage and switching from nano-scale to molecular catalytic systems: amines and temperature as catalyst activators
作者:Oleg V. Khazipov、Maxim A. Shevchenko、Dmitry V. Pasyukov、Andrey Yu. Chernenko、Alexander V. Astakhov、Victor A. Tafeenko、Victor M. Chernyshev、Valentine P. Ananikov
DOI:10.1039/c9cy02041a
日期:——
Reactions of Pd/NHC complexes with various amines within a temperature range of 25–140 °C and thermalstability of the resulting amino-complexes are examined. The results indicate the major influence of the amine structure and reaction temperature on the catalyst transformation. In particular, thermal decomposition of Pd/NHC complexes with aliphatic amine ligands predominantly leads to reductive Pd–NHC