Site-Selective Thiolation of (Multi)halogenated Heteroarenes
作者:Frederik Sandfort、Tobias Knecht、Tobias Pinkert、Constantin G. Daniliuc、Frank Glorius
DOI:10.1021/jacs.0c01630
日期:2020.4.15
complementing established methodologies such as nucleophilicaromaticsubstitution or palladium-catalyzed coupling reactions. Experimental and computational studies suggest a radical chain mechanism with the key step being a homolytic aromaticsubstitution of the heteroaryl halide by an electrophilic thiyl radical, highlighting an underdeveloped reactivity mode of these radicals.
Enhancing neuronal α7 nicotinicacetylcholinereceptor (α7 nAChR) function can alleviate cognitive deficits. Here, we report the design, synthesis, and evaluation of N-(4-(trifluoromethoxy)phenyl)-1,3,5-triazin-2-amine derivatives 8–10 as a series of novel α7 nAChR positive allosteric modulators (PAMs). The representative compound 10e functions as a type I PAM with an EC50 of 3.0 μM and approximately
Unique<i>para</i>-effect in electron ionization mass spectra of bis(perfluoroacyl) derivatives of bifunctional aminobenzenes
作者:Kirill V. Tretyakov、Nino G. Todua、Roman S. Borisov、Vladimir G. Zaikin、Stephen E. Stein、Anzor I. Mikaia
DOI:10.1002/rcm.4661
日期:2010.9.15
intense peaks in the EI spectra. The composition and the origin of the [M–COR–NCR]+ ions were confirmed by exact mass measurements and linked scan experiments. The proposed mechanism of their formation takes into account likely para‐quinoid structures of the precursor ions. A similar rearrangement has not been observed for para‐isomers in the series of bis(perfluoroacyl) derivatives of benzenediols, mercaptophenols
一种新的“的对位下电子电离-效应”(EI)条件下,已经发现了一系列的双(全氟酰基)衍生物ø - ,米-和p苯二胺类,-hydroxybenzeneamines和公共结构的-mercaptobenzeneamines RCOX- C 6 H 4 -NHCOR(X = NH,S,O; R = CF 3,C 2 F 5,C 3 F 7)。只有对位异构体显示出自由基RCO •和分子RCN的连续损失,导致EI光谱中出现非常强烈的峰。[M–COR–NCR] +的组成和来源通过精确的质量测量和链接的扫描实验确认了离子。拟议的形成机理考虑了前体离子的可能的对醌型结构。苯二醇,巯基酚和二巯基苯的双(全氟酰基)衍生物系列中的对位异构体未观察到类似的重排。John Wiley&Sons,Ltd.在2010年出版。
PROCESS FOR PRODUCING OPTICALLY ACTIVE SULFOXIDE DERIVATIVE
申请人:Takeda Pharmaceutical Company Limited
公开号:EP1484322A1
公开(公告)日:2004-12-08
A process for preparing an optically active sulfoxide derivative (I) having CCR5 antagonism without causing side reactions such as racemization and Pummerer rearrangement, which comprises reacting a compound (II) with a compound (III) as shown by the following scheme:
wherein R1 represents hydrogen, an aliphatic hydrocarbon group or an aromatic group; R2 represents halogeno, alkyl, hydroxyl, amino, an aromatic group, etc.; R3 represents a 5- or 6-membered ring; R4 represents hydrogen, alkyl, alkoxy or halogeno; R5 represents hydrogen, a hydrocarbon group, a heterocyclic group, acyl, etc.; ring A represents an optionally substituted benzene ring; X represents a bond or divalent group comprising a linear part constituted of 1 to 4 atoms; m represents an integer of 1 to 5; n represents an integer of 0 to 3; p represents an integer of 0 to 2; and *1 represents an asymmetric center.
Process for producing optically active sulfoxide derivative
申请人:Tawada Hiroyuki
公开号:US20050107606A1
公开(公告)日:2005-05-19
A process for preparing an optically active sulfoxide derivative (I) having CCR5 antagonism without causing side reactions such as racemization and Pummerer rearrangement, which comprises reacting a compound (II) with a compound (III) as shown by the following scheme:
wherein R
1
represents hydrogen, an aliphatic hydrocarbon group or an aromatic group; R
2
represents halogeno, alkyl, hydroxyl, amino, an aromatic group, etc.; R
3
represents a 5- or 6-membered ring; R
4
represents hydrogen, alkyl, alkoxy or halogeno; R
5
represents hydrogen, a hydrocarbon group, a heterocyclic group, acyl, etc.; ring A represents an optionally substituted benzene ring; X represents a bond or divalent group comprising a linear part constituted of 1 to 4 atoms; m represents an integer of 1 to 5; n represents an integer of 0 to 3; p represents an integer of 0 to 2; and *
1
represents an asymmetric center.