Air-Tolerant Direct Thiol Esterification with Carboxylic Acids Using Hydrosilane via Simple Inorganic Base Catalysis
作者:Maojie Xuan、Chunlei Lu、Meina Liu、Bo-Lin Lin
DOI:10.1021/acs.joc.9b00500
日期:2019.6.21
thioesterification of carboxylicacids with thiolsusing nontoxic activation agents is highly desirable. Herein, an efficient and practical protocol using safe and inexpensive industrial waste polymethylhydrosiloxane as the activation agent and K3PO4 with 18-crown-6 as a catalyst is described. Various functional groups on carboxylicacid and thiol substituents can be tolerated by the present system to afford thioesters
非常需要使用无毒的活化剂将羧酸与硫醇直接硫酯化。在此,描述了一种有效且实用的方案,该方案使用安全且廉价的工业废聚甲基氢硅氧烷作为活化剂,并以18-crown-6作为催化剂的K 3 PO 4。本系统可以耐受羧酸和硫醇取代基上的各种官能团,从而以19-100%的收率提供硫酯。
Oxalic Acid Monothioester for Palladium-Catalyzed Decarboxylative Thiocarbonylation and Hydrothiocarbonylation
作者:Bin Zhao、Yao Fu、Rui Shang
DOI:10.1021/acs.orglett.9b03701
日期:2019.12.6
hydrothiocarbonylation of unsaturated carbon–carbon bonds at room temperature with high chemo- and regioselectivity. The reaction is applicable to the synthesis of cysteine-derived thioesters, thus allowing chemical modification of cysteine-containing peptides. Decarboxylation of OAM proceeds through oxidative addition of Pd(0) to the acyl–S bond, which accounts for the very mild reaction conditions
Visible-Light-Promoted Thiyl Radical Generation from Sodium Sulfinates: A Radical–Radical Coupling to Thioesters
作者:Ganganna Bogonda、Dilip V. Patil、Hun Young Kim、Kyungsoo Oh
DOI:10.1021/acs.orglett.9b01218
日期:2019.5.17
available starting materials: acid chlorides and sodium sulfinates. The facile generation of acyl radical species under the visible light photoredox conditions allows the formation of thiylradical species from sodium sulfinates via multiple single electron transfer reactions, where the final acyl radical-thiyl radical coupling has been accomplished. The direct radical–radical coupling strategy offers a mild
Compounds that abrogate DNA-damage-induced cell cycle G2 checkpoint and/or augment the anti-cancer activity of DNA damaging treatments
申请人:——
公开号:US20040198727A1
公开(公告)日:2004-10-07
The invention provides compositions and methods to inhibit the cell cycle G2 checkpoint, in particular the DNA-damage-induced G2 checkpoint, in mammalian cells including human cells. Specifically, the invention provides compositions and methods to sensitize cells to DNA-damaging agents by abrogating the cell cycle G2 checkpoint. Compounds of the invention are used to treat proliferative disorders such as cancer. The invention provides compositions and methods for selectively sensitizing G1 checkpoint impaired cancer cells to DNA-damaging agents and treatments.
Compounds that abrogate DNA damage induced cell cycle G2 checkpoint and/or augment anti-cancer activity of DNA-damaging treatments
申请人:Kawabe Takumi
公开号:US20060122269A1
公开(公告)日:2006-06-08
The invention provides compositions and methods to inhibit the cell cycle G2 checkpoint, in particular the DNA-damage-induced G2 checkpoint, in mammalian cells including human cells. Specifically, the invention provides compositions and methods to sensitize cells to DNA-damaging agents by abrogating the cell cycle G2 checkpoint. Compounds of the invention are used to treat proliferative disorders such as cancer. The invention provides compositions and methods for selectively sensitizing G1 checkpoint impaired cancer cells to DNA-damaging agents and treatments.