1-Arylethanones are readily chlorinated with an aqueous HCl-H2O2 system using ethanol as a cosolvent. The reaction proceeds rapidly and results in selective conversion of 1-arylethanones into 1-aryl-2,2-dichloroethanones in yields of 48-89%, depending on the nature of the substituent in the aryl group.
Halogenation Using Quaternary Ammonium Polyhalides. XXXII. Dichlorination of Aromatic Acetyl Derivatives with Benzyltrimethylammonium Tetrachloroiodate
The reaction of aromatic acetyl derivatives with 2 molar amounts of benzyltrimethylammonium tetrachloroiodate in acetic acid at 70 °C for several hours gave dichloroacetyl derivatives in good yields.
芳族乙酰衍生物与 2 摩尔量的四氯碘酸苄基三甲基铵在 70 °C 的乙酸中反应几个小时,以良好的收率得到二氯乙酰衍生物。
10.1002/aoc.7532
作者:Wang, Huahui、Wu, Sichao、Zeng, Xianghua、Chen, Lu
DOI:10.1002/aoc.7532
日期:——
provides a foundational raw material for the subsequent synthesis of chlorinated functional molecules, which is achieved through a mild transformation of arylalkynes using readily available commercial feedstocks and exhibiting good tolerance with various substituents on the aromatic ring, including the aliphatic alkyne. This novel heterogeneous catalyst may be used in numerous industrial applications
本研究通过简单的方法制备了新型Cu@CuFe 2 O 4 纳米粒子。通过利用 N-氯代琥珀酰亚胺(NCS)作为氯源和 Cu@CuFe 2 O 4 磁性纳米颗粒(NPs)作为可回收催化剂的兼容系统,我们提出了一种新颖实用的催化剂。在三氟乙醇(TFE)水溶液中直接获得芳基α,α-二氯酮的方法。催化剂被回收并重复使用多达五次,活性没有明显下降。目前的研究为随后合成氯化功能分子提供了基础原料,这是通过使用易于获得的商业原料对芳基炔进行温和转化来实现的,并且对芳环上的各种取代基(包括脂肪族炔)表现出良好的耐受性。这种新型非均相催化剂具有可回收性高、催化剂负载量要求低、成本效益高、易于处理等优点,可用于多种工业应用。
Dichloroacetophenones targeting at pyruvate dehydrogenase kinase 1 with improved selectivity and antiproliferative activity: Synthesis and structure-activity relationships
作者:Shao-Lin Zhang、Zheng Yang、Xiaohui Hu、Kin Yip Tam
DOI:10.1016/j.bmcl.2018.09.026
日期:2018.11
Dichloroacetophenone is a pyruvate dehydrogenase kinase 1 (PDK1) inhibitor with suboptimal kinase selectivity. Herein, we report the synthesis and biological evaluation of a series of novel dichloroacetophenones. Structure-activity relationship analyses (SARs) enabled us to identify three potent compounds, namely 54, 55, and 64, which inhibited PDK1 function, activated pyruvate dehydrogenase complex