This invention is directed to compounds of the formula ##STR1## wherein X is a thiazine or thiazepine selected from ##STR2## These compounds possess angiotensin converting enzyme inhibition activity and are thus useful as hypotensive agents.
Nucleophilic Rh
<sup>I</sup>
Catalyzed Selective Isomerization of Terminal Aziridines to Enamides
作者:Yingying Tian、Doris Kunz
DOI:10.1002/cctc.202000597
日期:2020.9.4
selective isomerization of various terminal N‐Boc protected aziridines to enamides was realized using the highly reactive nucleophilic rhodium catalyst C with the Lewisacid LiNTf2 as co‐catalyst under moderate conditions. The reaction proceeds smoothly with only 1 mol% catalyst loading and excellent yields were achieved. An intermediate containing an enamide with a non‐conjugated terminal C=C double bond
Iridium-Catalyzed Asymmetric Hydrogenation of Simple Ketones with Tridentate PNN Ligands Bearing Unsymmetrical Vicinal Diamines
作者:Lei Zhang、Chengyu Liu、Maolin Sun、Chaoming Liang、Liming Cao、Xiantong Yao、Yueyue Ma、Ruihua Cheng、Jinxing Ye
DOI:10.1021/acs.joc.2c02676
日期:2023.3.3
tunable unsymmetrical vicinaldiamine scaffold was developed for the asymmetric hydrogenation of aryl ketones. This approach provided a powerful tool for the enantioselective synthesis of diverse chiral alcohols with excellent reactivity and enantioselectivity (up to 99% yield, up to 99% ee, and up to 50,000 turnover number). The substituents and chirality of unsymmetrical diamines in ligands played an
开发了一种带有基于二茂铁的膦配体的铱催化系统,该配体带有模块化和可调谐的不对称邻位二胺支架,用于芳基酮的不对称氢化。这种方法为对映选择性合成多种手性醇提供了强大的工具,具有出色的反应性和对映选择性(高达 99% 的产率、高达 99% 的 ee 和高达 50,000 的转换数)。配体中不对称二胺的取代基和手性对获得令人满意的结果起着重要作用。