Photocatalyzed Decarboxylative Thiolation of Carboxylic Acids Enabled by Fluorinated Disulfide
作者:Mikhail O. Zubkov、Mikhail D. Kosobokov、Vitalij V. Levin、Alexander D. Dilman
DOI:10.1021/acs.orglett.2c00549
日期:2022.4.1
of carboxylicacids using a disulfide reagent having tetrafluoropyridinyl groups is described. The light-mediated process is performed using an acridine-type photocatalyst. Primary, secondary, tertiary, and heteroatom-substituted carboxylicacids can be thiolated, and the method can be applied to the late-stage modification of a range of naturally occurring compounds and drugs. The fluorinated pyridine
Photocatalytic Carboxylate to Sulfinamide Switching Delivers a Divergent Synthesis of Sulfonamides and Sulfonimidamides
作者:Jonathan A. Andrews、Jagadeesh Kalepu、Christopher F. Palmer、Darren L. Poole、Kirsten E. Christensen、Michael C. Willis
DOI:10.1021/jacs.3c07974
日期:2023.10.4
medicinal chemistry, yet methods for the synthesis of alkyl variants that start from simple, readily available feedstocks are scarce. In addition, bespoke syntheses of each class of molecules are usually needed. In this report, we detail the synthesis of these three distinct sulfur functional groups, using readily available and structurally diverse alkyl carboxylic acids as the starting materials. The method
Alkanes in Minisci-Type Reaction under Photocatalytic Conditions with Hydrogen Evolution
作者:Loris Laze、Beatriz Quevedo-Flores、Irene Bosque、Jose C. Gonzalez-Gomez
DOI:10.1021/acs.orglett.3c02619
日期:2023.12.8
We report herein a protocol for the selective activation of C(sp3)–H bonds based on the interplay of two readily available organic catalysts and their successful implementation in cross-coupling azaarenes with alkanes. This Minisci-like reaction is promoted by visible light at room temperature and is free from chemical oxidants, metals, and chlorinated solvents. A wide range of substrates are compatible
COMPOSITION FOR OPTICAL THREE-DIMENSIONAL MODELING AND METHOD FOR PRODUCING THREE-DIMENSIONAL MODEL USING SAME
申请人:Okamoto Chemical Industry Co., Ltd
公开号:EP3281964A1
公开(公告)日:2018-02-14
An object of the present invention is to provide: a safe, water-soluble composition for optical stereo lithography imposing less environmental burden and enabling cured film layers to adhere to one another in a process of producing a stereo lithographic object, producing a stereo lithographic object having a small warp deformation and excellent mechanical properties; and a method for producing a stereolithographic object using the composition. Specifically, provided is a water-soluble composition for optical stereolithography, containing: 10 to 70% by mass of (A) a water-soluble cationic polymerizable compound which is an ether derivative compound of sorbitol having a glycidyl ether structure: 1 to 30% by mass of (B) a water-soluble radical polymerizable compound having a methacrylic group and/or an acrylic group; 0.1 to 20% by mass of (C) an antimony-free cationic polymerization initiator which is a sulfonium compound or a bis(alkylphenyl)iodonium compound; and 0.1 to 20% by mass of (D) a radical polymerization initiator.
Provided is a composition for optical stereolithography, which is photo-curable within a shorter time, and is excellent in mechanical properties after photo-curing. Specifically, provided is a composition for optical stereolithography containing (A) a cationic polymerizable epoxy resin that is a novolac epoxy resin and/or an epoxy resin having a predetermined structure; (B) a cationic polymerizable compound being other than the component (A) and having a glycidyl ether structure; (C) a radical polymerizable compound having a methacrylic group and/or an acrylic group; (D) a styrene-containing copolymer resin that is a copolymer resin of styrene and predetermined maleic anhydride and/or a copolymer resin of styrene and methacrylic acid or acrylic acid; (E) a cationic polymerization initiator that is a sulfonium compound or a bis(alkylphenyl)iodonium compound; (F) a radical polymerization initiator; and (G) a sensitizer.