Hydrogen Peroxide or Peracetic Acid Mediated Self-Titrating α-Halogenation of 1,3-Dicarbonyl Compounds
作者:Hasim Ibrahim、Ramulu Akula、Marc Galligan
DOI:10.1055/s-0030-1258367
日期:2011.1
Efficient oxidative α-halogenation of 1,3-dicarbonylcompounds has been achieved by employing a system comprising of sub-stoichiometric amounts of TiX4 (X = Cl, Br) in conjunction with environmentally benign hydrogen peroxide (H2O2) or peracetic acid (MeCO3H) as the oxidants. The end point of the reaction is accompanied by a sharp colour change. halogenation - peroxides - titanium - halides - electrophilic
通过使用包含亚化学计量量的TiX 4(X = Cl,Br)以及环境友好的过氧化氢(H 2 O 2)或过氧乙酸的系统,可以实现1,3-二羰基化合物的有效氧化α-卤化酸(MeCO 3 H)作为氧化剂。反应的终点伴随着急剧的颜色变化。 卤化-过氧化物-钛-卤化物-亲电子
Umpolung of halide reactivity: efficient (diacetoxyiodo)benzene-mediated electrophilic α-halogenation of 1,3-dicarbonyl compounds
作者:Ramulu Akula、Marc Galligan、Hasim Ibrahim
DOI:10.1039/b915348a
日期:——
An efficient high-yielding (diacetoxyiodo)benzene-mediated α-halogenation of 1,3-dicarbonyl compounds utilising titanium tetrahalides as the halide source has been developed.
The present application provides compounds, including all stereoisomers, solvates, prodrugs and pharmaceutically acceptable faints thereof according to
wherein all of the variables are defined herein.
The present application provides compounds, including all stereoisomers, solvates, prodrugs and pharmaceutically acceptable forms thereof according to Formula I
wherein all of the variables are defined herein.
Useful Access to Uncommon Thiazolo[3,2-<i>a</i>]indoles
作者:Giacomo Mari、Lucia De Crescentini、Gianfranco Favi、Amalija Golobič、Stefania Santeusanio、Fabio Mantellini
DOI:10.1021/acs.joc.3c02338
日期:2024.1.19
A practical and environmentally benign protocol for the assembly of poly substituted-thiazolo[3,2-a]indoles from 3-alkylated indoline-2-thiones and 2-halo-ketones has been developed. This metal-free approach consists in a complete chemo/regioselective formal [3 + 2] annulation that occurs in air, at 60 °C, and in water as the sole reaction medium. The opportunity to vary the substitution pattern up
已经开发了一种实用且环境无害的方案,用于从 3-烷基化吲哚啉-2-硫酮和 2-卤代酮组装聚取代噻唑并[3,2-a]吲哚。这种无金属方法包括在空气中、60 °C 和水中作为唯一反应介质的完全化学/区域选择性形式 [3 + 2] 环化。该方法的主要合成特点是有机会将取代模式改变到多达六个不同的位置、无味的硫酸化化合物操作、非常容易的产物分离以及温和的反应条件。按比例放大的实验和产物的连续转化进一步证明了这种化学的实用性。