通过将氢原子转移和无痕导向策略与 SR 作为瞬态基团相结合,实现了第一次 Cu 催化的丰富末端炔烃的 1,2,5-三官能化,以中等至优异的产率提供高度官能化的醛,具有广泛的底物范围。该方法的合成效用通过克级反应和所得产物的下游转化得到证明。鉴于在单个反应中高效安装三种不同的官能团,它可以作为一种非常有吸引力的方法,用于从容易获得的起始材料快速组装复杂分子。
Reductive Coupling between C–N and C–O Electrophiles
作者:Rong-De He、Chun-Ling Li、Qiu-Quan Pan、Peng Guo、Xue-Yuan Liu、Xing-Zhong Shu
DOI:10.1021/jacs.9b05224
日期:2019.8.14
The cross-electrophile reaction is a promising strategy for C-C bond formation. Recent studies have focused mainly on reactions with organic halides. Here we report a coupling reaction between C-N and C-O electrophiles that demonstrates the possibility of constructing a C-C bond via C-N and C-O cleavage. Several reactions between benzyl/aryl ammonium salts and vinyl/aryl C-O electrophiles have been
交叉亲电反应是 CC 键形成的一个有前景的策略。最近的研究主要集中在与有机卤化物的反应上。在这里,我们报告了 CN 和 CO 亲电试剂之间的偶联反应,证明了通过 CN 和 CO 裂解构建 CC 键的可能性。已经研究了苄基/芳基铵盐和乙烯基/芳基 CO 亲电试剂之间的几种反应。初步机理研究表明,苄基铵是通过自由基机制活化的。
Sphingosine-1-phosphate receptor agonist and antagonist compounds
申请人:Wallace Grier A.
公开号:US20090029947A1
公开(公告)日:2009-01-29
The present invention is directed to novel, potent, and selective agents, which are agonists or antagonists of the one or more of the individual receptors of the S1P receptor family. The compounds of the invention are useful as therapeutics for treating medical conditions associated with agonism or antagonism of the individual receptors of the S1P receptor family.
A pharmaceutical composition is provided that has a low toxicity, demonstrates superior physicochemical properties and pharmacokinetics, and has superior peripheral blood lymphocyte count lowering activity. The pharmaceutical composition contains a compound having general formula (I):
[Chemical Formula 1]
(wherein R
1
represents a methyl group or an ethyl group, R
2
represents a methyl group or an ethyl group, and R
3
represents a phenyl group substituted with 1 to 3 substituents selected from the group consisting of a halogen atom, a lower alkyl group, a cycloalkyl group, a lower alkoxy group, a halogeno lower alkyl group, a lower aliphatic acyl group and a cyano group), a pharmacologically acceptable salt thereof or a pharmacologically acceptable ester thereof.
Methods for Preparing S1P Receptor Agonists and Antagonists
申请人:Shekhar Shashank
公开号:US20110190540A1
公开(公告)日:2011-08-04
Disclosed herein are methods of making compounds which are agonists or antagonists of one or more of the individual receptors of the S1P receptor family.
本文公开了一种制备S1P受体家族中一个或多个单个受体的激动剂或拮抗剂化合物的方法。
ORGANIC SULFUR COMPOUND AND ITS USE FOR CONTROLLING HARMFUL ARTHROPOD
申请人:Miyazaki Hiroyuki
公开号:US20100160434A1
公开(公告)日:2010-06-24
There is provided an organic sulfur compound having an excellent controlling effect on harmful arthropods represented by the formula (I): wherein, R
1
represents a C3-C10 alkenyl group optionally substituted with at least one halogen atom, a C3-C10 alkynyl group optionally substituted with at least one halogen atom, or the like, R
2
represents a cyano group or the like, R
3
represents a hydrogen atom, a halogen atom or a C1-C4 alkyl group, R
4
represents a C1-C5 fluoroalkyl group, and n represents 0, 1 or 2.