Chiral‐Organotin‐Catalyzed Kinetic Resolution of Vicinal Amino Alcohols
作者:Hui Yang、Wen‐Hua Zheng
DOI:10.1002/anie.201909700
日期:2019.11.4
A highlyefficientkineticresolution of racemic amino alcohols has been achieved for the first time with a chiral tin catalyst. A chiral organotin compound with 3,4,5-trifluorophenyl groups at the 3,3'-positions of the binaphthyl framework enabled this transformation with excellent yield and highenantioselectivity. The process tolerates aryl- and alkyl-substituted amino alcohols and a variety of
This invention concerns novel imidazo[1,2-b]-pyridazines and their use as agents for treating anxiety.
这项发明涉及新型咪唑并[1,2-b]-吡啶嗪及其作为治疗焦虑症的药物的用途。
The Potts model and the Tutte polynomial
作者:D. J. A. Welsh、C. Merino
DOI:10.1063/1.533181
日期:2000.3
relation between the partition function of the Pottsmodel and the Tuttepolynomial. On the assumption that the Pottsmodel is more familiar we have concentrated on the latter and its interpretations. In particular we highlight the connections with Abelian sandpiles, counting problems on random graphs, error correcting codes, and the Ehrhart polynomial of a zonotope. Where possible we use the mean field
这是一篇关于 Potts 模型的配分函数和 Tutte 多项式之间关系的特邀调查。假设 Potts 模型更为熟悉,我们将重点放在后者及其解释上。我们特别强调了与阿贝尔沙堆的联系、随机图上的计数问题、纠错码和带位环的 Ehrhart 多项式。在可能的情况下,我们使用平均场和方格作为说明。我们还详细讨论了所涉及的复杂性问题。
BENZOTRIAZOLE DERIVATIVE
申请人:Ube Industries, Ltd.
公开号:EP3978073A1
公开(公告)日:2022-04-06
The present invention provides a compound having Keap1 inhibitory effects and a pharmaceutical composition containing the same. Specifically, the present invention provides a compound represented by the following general formula (I):
[wherein the symbols have the same meanings as those described in the description] or a pharmaceutically acceptable salt thereof and a pharmaceutical composition containing the same.
Selective hydrogenolysis of bio-renewable tetrahydrofurfurylamine to piperidine on ReO<sub><i>x</i></sub>-modified Rh catalysts
作者:Cheng-Bin Hong、Guoliang Li、Haichao Liu
DOI:10.1039/d2gc04388b
日期:——
stability in the THFAM reaction to piperidine, providing a high yield of 91.5% at 200 °C and 2.0 MPa H2 in water. Such high efficiency of Rh–ReOx/SiO2 was found to be related to the synergistic effect between the Rh nanoparticles and ReOx species on the kinetically-relevant cleavage of the C–O bond neighboring the C–NH2 group in THFAM, involving the strong adsorption of the C–NH2 group on ReOx and the heterolytic
哌啶是一种重要的环胺,用途广泛。但其商业化过程并不绿色,主要依赖化石资源型吡啶加氢。在这里,我们报告了一种新型的一锅法,通过氢解生成 5-氨基-1-戊醇 (APO) 以及随后的 APO 分子内胺化,从生物可再生四氢糠胺 (THFAM) 可持续合成哌啶。SiO 2负载的 Rh–ReO x催化剂在 THFAM 反应生成哌啶方面表现出高效率和稳定性,在 200 °C 和水中2.0 MPa H 2下提供 91.5% 的高产率。Rh–ReO x /SiO 2如此高的效率被发现与 Rh 纳米颗粒和 ReO x物种之间对 THFAM 中与 C-NH 2基团相邻的 C-O 键的动力学相关裂解的协同效应有关,涉及 C-NH 2基团的强吸附在 ReO x上和 H 2在 Rh 上的异裂解离。该工作为选择性裂解C-NH 2基团附近的C-O键提供了一种有效的策略,无论它们是否存在于氨基醚或氨基醇中,以及从生物质资源中绿色生产哌啶及其衍生物。