Influence of
<i>N</i>
‐Substitution in 3‐Alkyl‐3‐hydroxyisoindolin‐1‐ones on the Stereoselectivity of Brønsted Acid‐Catalyzed Synthesis of 3‐Methyleneisoindolin‐1‐ones
作者:Nikola Topolovčan、Filip Duplić、Matija Gredičak
DOI:10.1002/ejoc.202100400
日期:2021.7.26
Brønsted acid-catalyzed dehydration of 3-alkyl-3-hydroxyisoindolin-1-ones is discussed. The reaction is efficiently catalyzed by methanesulfonic acid in acetonitrile and provides the corresponding 3-methyleneisoindolin-1-ones. The E/Z stereochemistry around the exocyclic double bond is in strong correlation with the size of the N-substituent. Selective formation of only one stereoisomer can be controlled
Chemoselective and Regioselective Synthesis of Spiroisoindolinone Indenes via an Intercepted Meyer–Schuster Rearrangement/Intramolecular Friedel–Crafts Alkylation Relay
rapidly with a broad range of substrates to generate spiroindenes chemoselectively and regioselectively in moderate to high yields. Key to the success of this transformation is an intercepted Meyer–Schuster rearrangement/intramolecular Friedel–Crafts alkylation relay that offers a modular approach in the synthesis of target compounds.
N-ureidoalkyl-piperidines as modulators of chemokine receptor activity
申请人:Ko S. Soo
公开号:US20050192291A1
公开(公告)日:2005-09-01
The present application describes modulators of CCR3 of formula (I):
or pharmaceutically acceptable salt forms thereof, useful for the prevention of asthma and other allergic diseases.
neutral visible light-induced regioselective C(sp2)–H imidation of electron-rich arenes and heteroarenes using conceptually designed redox-active 1 as a source of the N-centered imidyl radical. Structurally diverse aromatic imides were obtained in moderate to good yields. This methodology has been successfully employed for the late stage imidation of complex molecules and has also been applied towards
我们在此报道了一种氧化还原中性可见光诱导的富电子芳烃和杂芳烃的区域选择性 C(sp 2 )–H 亚胺化,使用概念设计的氧化还原活性1作为以 N 为中心的亚胺自由基的来源。以中等到良好的产率获得了结构多样的芳香族酰亚胺。该方法已成功用于复杂分子的后期酰亚胺化,也已应用于海洋天然产物 carpatamides A、B 和 D 的正式全合成。进一步表明,生成的酰亚胺可以很容易地转化为直接就地生成相应的苯胺。
Synthesis and in-vitro biological activity of macrocyclic urea Chk1 inhibitors
作者:Gaoquan Li、Zhi-Fu Tao、Yunsong Tong、Magdalena K. Przytulinska、Peter Kovar、Philip Merta、Zehan Chen、Haiying Zhang、Thomas Sowin、Saul H. Rosenberg、Nan-Horng Lin
DOI:10.1016/j.bmcl.2007.09.088
日期:2007.12
A variety of macrocyclic urea compounds were prepared as potent Chk1 inhibitors by modifying the C5 position of the benzene ring of the macrocyclic urea with ether moieties, aliphatic carbon chains, amide and halides. Enzymatic activity less than 20 nM was observed in 29 of 40 compounds. Compounds 14, 46d, and 48j provided the best overall results in the cellular assays as they abrogated doxorubicin-induced cell cycle arrest (IC50 = 3.31, 3.08, and 3.13 mu M) and enhanced doxorubicin cytotoxicity (IC50 = 0.54, 1.27, and 0.96 mu M) while displaying no single agent activity, respectively. (c) 2007 Elsevier Ltd. All rights reserved.