Deaminative metal-free reaction of alkenylboronic acids, sodium metabisulfite and Katritzky salts
作者:Tonghao Zhu、Jia Shen、Yuyuan Sun、Jie Wu
DOI:10.1039/d0cc07632e
日期:——
observed and sodium metabisulfite is used as the source of sulfur dioxide. Mechanistic studies show that the alkyl radical generated in situ from Katritzky salt via a single electron transfer with alkenylboronic acid or DIPEA is the key step for providing an alkyl radical intermediate, which undergoes further alkylsulfonylation with sulfur dioxide.
Synthesis of Vinyl and 1,3‐Dienyl Sulfones Enabled by Photochemical Excitation of Halogen‐Bonding Complexes
作者:Helena F. Piedra、Carlos Valdés、Manuel Plaza
DOI:10.1002/adsc.202301381
日期:2024.3.19
interaction, a non-bonding orbital of a nucleophilic electrondonor (HaB acceptor) engages in charge transfer with an antibonding orbital (σ*) of an electron acceptor-specifically, the corresponding organic halide (HaB donor).14 This stabilizing interplay is instrumental in the creation of halogen-bonding complexes, a distinctive subset of EDA (electron donor-acceptor) complexes.15 Initiating a photochemical
Silicone-sulfone and silicone-fluorocarbon-sulfone gas permeable contact lenses and compositions thereof
申请人:PROGRESSIVE OPTICAL RESEARCH LTD.
公开号:EP0231572A2
公开(公告)日:1987-08-12
Highly oxygen permeable hard and semi-hard contact lenses are made from the copolymer of ethylenically unsaturated siloxane ester, ethylenically unsaturated fluorocarbon ester and ethylenically unsaturated sulfone monomer and methods for the polymerization thereof.
Fluorosulfone-silicone hydrogel RGP contact lenses, optical medical devices and compositions thereof
申请人:Novicky, Nick N.
公开号:EP1455201A1
公开(公告)日:2004-09-08
Highly comfortable oxygen permeable and hydrophilic contact lenses are manufactured from a copolymer of an ethylenically unsaturated novel monomers Bis(perfluoroalkylsulfonyl)-amidoethyl methacrylate, Bis(alkylsulfonyl)amidoethyl methacrylate, (N-alkylsulfonyl-N'-perfluoroalkylsulfonyl)amidoethyl methacrylate and organosilicone ester monomers of acrylic and methacrylic acid and ethylenically unsaturated ester monomers of methacrylic acid having alkyl hydroxy groups, N-vinyl 2-pyrolidinone, dimethylacrylamide, methacrylic acid and methods for the manufacturing thereof.
Fluorocarbon-sulfone hydrophilic contact lenses, optical medical devices and compositions thereof
申请人:——
公开号:US20030027886A1
公开(公告)日:2003-02-06
Highly comfortable hydrophilic contact lenses are made from a coploymer of an ethylenically unsaturated fluoro-sulfone ester, ethylenically unsaturated fluorosulfone ester monomer of acrylic or methacrylic acid having alkyl hydroxy group and N-Vinyl 2-pyrrolidinone and methods for the manufacturing thereof.