描述了一种新的协同镍还原催化和N,N-二甲基甲酰胺介导的策略,用于S- (三氟甲基)芳基硫代磺酸酯与烷基卤的 C S 自由基还原交叉偶联生产烷基芳基硫醚。该反应具有优异的选择性、广泛的功能耐受性、广泛的底物范围以及易于对生物相关分子进行后期修饰。机理研究认识到,通过用 Sn 热诱导 DMF还原,最初生成酰胺自由基阴离子,然后进行反极化还原和亲核磺酰基部分的单电子转移,形成巯基自由基并与 Ni 0 /Ni I /Ni III接合/Ni I催化循环。
HYALURONIC ACID DERIVATIVE HAVING CATIONIC GROUP AND HYDROPHOBIC GROUP INTRODUCED THEREIN
申请人:Chugai Seiyaku Kabushiki Kaisha
公开号:EP3456745A1
公开(公告)日:2019-03-20
The present invention provides hyaluronic acid derivatives into which a certain cationic group and a certain hydrophobic group are introduced, the hyaluronic acid derivatives including one or more repeating units represented by the formula (Ia) and one or more repeating units represented by the formula (Ib).
HYALURONIC ACID DERIVATIVE MODIFIED WITH POLY(ETHYLENE GLYCOL)
申请人:Chugai Seiyaku Kabushiki Kaisha
公开号:EP3712181A1
公开(公告)日:2020-09-23
The present invention provides hyaluronic acid derivatives including one or more of each of repeating units represented by the formulae (Ia), (Ib), and (Ic) in which certain cationic sites, certain hydrophobic sites, and certain hydrophilic sites have been introduced. In addition, the present invention provides complexes of the hyaluronic acid derivatives with a drug and pharmaceutical compositions including the hyaluronic acid derivatives, in particular, complexes of the hyaluronic acid derivatives with a drug.
[EN] HYALURONIC ACID DERIVATIVE HAVING CATIONIC GROUP AND HYDROPHOBIC GROUP INTRODUCED THEREIN<br/>[FR] DÉRIVÉ D'ACIDE HYALURONIQUE AYANT UN GROUPE CATIONIQUE ET UN GROUPE HYDROPHOBE INTRODUIT DANS CELUI-CI<br/>[JA] カチオン性基および疎水性基が導入されたヒアルロン酸誘導体
4-Aminophenyldiphenylphosphinite (APDPP), a new heterogeneous and acid scavenger phosphinite — Conversion of alcohols, trimethylsilyl, and tetrahydropyranyl ethers to alkyl halides with halogens or <i>N</i>-halosuccinimides
conversion of alcohols, trimethylsilyl ethers, and tetrahydropyranyl ethers to their corresponding bromides, iodides, and chlorides in the presence of molecular halogens or N-halosuccinimides. The amino group in this phosphinite acts as an acid scavenger and removes the produced acid. A simple filtration easily removes the phosphinate by-product.Key words: 4-aminophenyldiphenylphosphinite, alcohol, trimethylsilyl
Nickel‐catalyzed umpolung C S radical reductive cross coupling of S‐(trifluoromethyl)arylsulfonothioates with alkyl halides
作者:Yu-Zhong Yang、Gui-Fen Lv、Ming Hu、Yang Li、Jin-Heng Li
DOI:10.1016/j.cclet.2023.108590
日期:2023.11
A new cooperative nickelreductive catalysis and N,N-dimethylformamide-mediated strategy for umpolung CS radical reductive cross coupling of S-(trifluoromethyl)arylsulfonothioates with alkyl halides to produce alkyl aryl thioethers is described. This reaction features excellent selectivity, wide functionality tolerance, broad substrate scope, and facile late-stage modification of biologically relevant
描述了一种新的协同镍还原催化和N,N-二甲基甲酰胺介导的策略,用于S- (三氟甲基)芳基硫代磺酸酯与烷基卤的 C S 自由基还原交叉偶联生产烷基芳基硫醚。该反应具有优异的选择性、广泛的功能耐受性、广泛的底物范围以及易于对生物相关分子进行后期修饰。机理研究认识到,通过用 Sn 热诱导 DMF还原,最初生成酰胺自由基阴离子,然后进行反极化还原和亲核磺酰基部分的单电子转移,形成巯基自由基并与 Ni 0 /Ni I /Ni III接合/Ni I催化循环。