Assembly of Tetrahydroquinolines and 2-Benzazepines by Pd-Catalyzed Cycloadditions Involving the Activation of C(sp<sup>3</sup>)–H Bonds
作者:Xandro Vidal、José Luis Mascareñas、Moisés Gulías
DOI:10.1021/acs.orglett.1c01594
日期:2021.7.16
Cycloadditionreactions are among the most practical strategies to assemble cyclic products; however, they usually require the presence of reactive functional groups in the reactants. Here, we report a palladium-catalyzed formal (4 + 2) cycloaddition that involves the activation of C(sp3)–H bonds and provides a direct, unconventional entry to tetrahydroquinoline skeletons. The reaction utilizes amidotolyl
[EN] AZOLE-FUSED PYRIDAZIN-3(2H)-ONE DERIVATIVES<br/>[FR] DÉRIVÉS DE PYRIDAZIN-3(2H)-ONE FUSIONNÉS PAR UN AZOLE
申请人:TAKEDA PHARMACEUTICALS CO
公开号:WO2021055326A1
公开(公告)日:2021-03-25
Disclosed are compounds of Formula (1) and pharmaceutically acceptable salts thereof, wherein α, β, n, R4, R5, R6, R8, R9, R10, R11, X1, X2, X3 and X7 are defined in the specification. This disclosure also relates to materials and methods for preparing compounds of Formula (1), to pharmaceutical compositions comprising them, and to their use for treating diseases, disorders, and conditions associated with GPR139.
Dynamic stereochemistry of imines and derivatives. Part 16. Conformation and stereodynamics of oxaziridines, nitrones, and imines containing the N-(1-mesitylethyl) or (1-pentamethylphenylethyl) group; a nuclear magnetic resonance and X-ray crystallographic investigation
作者:Derek R. Boyd、Kenneth M. McCombe、Thomas A. Hamor、W. Brian Jennings、Valerie E. Wilson
DOI:10.1039/p29840000095
日期:——
barriers(8–17 kcal mol–1)were evaluated by lineshape analysis and compared with that in 1-mesitylethylamine. The conformation of 3,3-diphenyl-2-(1-mesitylethyl)oxaziridine (1), which shows abnormal ortho-methyl signal positions and a high rotational barrier, has been determined in the solid state by X-ray crystallography.
在环境温度或低于环境温度下观察到的八个标题化合物中的邻甲基的1 H nmr化学位移非等价性被指定为绕芳基-CHMe键缓慢旋转。通过线形分析评估了旋转势垒(8–17 kcal mol –1),并将其与1-甲基间乙胺进行了比较。已经通过X射线晶体学测定了处于固态的3,3-二苯基-2-(1-间甲苯基乙基)恶二丙啶(1)的构型,该构型显示出异常的邻甲基信号位置和高的旋转势垒。
Process for producing optically active 3,3,3-trifluoro-2-hydroxy-2-methylpropionic acid, and salt thereof
申请人:Sumitomo Chemical Company, Limited
公开号:US20030232886A1
公开(公告)日:2003-12-18
There are disclosed imine compounds of formula (7) and (11), and processes for preparing the same:
1
Chiral Ligands Based on Binaphthyl Scaffolds for Pd-Catalyzed Enantioselective C–H Activation/Cycloaddition Reactions
作者:José Manuel González、Xandro Vidal、Manuel Angel Ortuño、José Luis Mascareñas、Moisés Gulías
DOI:10.1021/jacs.2c09479
日期:2022.11.30
which are well-known to favor Pd-promoted C–H activations via concerted metalation–deprotonation mechanisms. We demonstrate that our new ligands enable substantially higher enantioselectivities than MPAAs in the assembly of 2-benzazepines through formal (5 + 2) cycloadditions between homobenzyltriflamides or o-methylbenzyltriflamides and allenes.