Synthesis and Biological Activity of New 3-Hydroxy-3-methylglutaryl Coenzyme A (HMG-CoA) Synthase Inhibitors: 2-Oxetanones with a Side Chain Mimicking the Folded Structure of 1233A.
Synthesis and Biological Activity of New 3-Hydroxy-3-methylglutaryl Coenzyme A (HMG-CoA) Synthase Inhibitors: 2-Oxetanones with a Side Chain Mimicking the Folded Structure of 1233A.
Hydrogen‐Bonding Assisted Catalytic Kinetic Resolution of Acyclic β‐Hydroxy Amides
作者:Arka Porey、Bhaskar Deb Mondal、Joyram Guin
DOI:10.1002/anie.202015004
日期:2021.4.12
Enantioenriched acyclic α‐substituted β‐hydroxy amides are valuable compounds in chemical, material and medicinal sciences, but their enantioselective synthesis remains challenging. A catalytic kinetic resolution (KR) of such amides with selectivity factor(s) up to >200 is developed via enantioselective acylation of primary alcohol with N‐heterocyclic carbene. An enhanced selectivity for the catalytic
Transfer Hydrogenation of Aldehydes and Ketones with Isopropanol under Neutral Conditions Catalyzed by a Metal–Ligand Bifunctional Catalyst [Cp*Ir(2,2′-bpyO)(H<sub>2</sub>O)]
作者:Rongzhou Wang、Yawen Tang、Meng Xu、Chong Meng、Feng Li
DOI:10.1021/acs.joc.7b03174
日期:2018.2.16
A Cp*Ir complex bearing a functional bipyridonate ligand [Cp*Ir(2,2′-bpyO)(H2O)] was found to be a highly efficient and general catalyst for transfer hydrogenation of aldehydes and chemoselective transfer hydrogenation of unsaturated aldehydes with isopropanol under neutral conditions. It was noteworthy that many readily reducible or labile functional groups such as nitro, cyano, ester, and halide
Silylative Reductive Amination of α,β-Unsaturated Aldehydes: A Convenient Synthetic Route to β-Silylated Secondary Amines
作者:Eunae Kim、Sehoon Park、Sukbok Chang
DOI:10.1002/chem.201800958
日期:2018.4.17
Described here is a reductive amination/hydrosilylation cascade of α,β‐unsaturated aldehydes mediated by a Lewisacidic borane catalyst. The present reaction system provides an one‐pot synthetic route towards β‐silylated secondary amines that have not been accessible by other previous catalysis. Comparative 1H NMR studies on the silylative reduction of enimines revealed that steric bulkiness of primary
这里描述的是路易斯酸性硼烷催化剂介导的α,β-不饱和醛的还原胺化/氢化硅烷化级联。本反应系统提供了一种单罐合成路线,可通往其他先前催化无法达到的β-甲硅烷基化仲胺。对亚胺的甲硅烷基化还原进行的比较1 H NMR研究表明,伯胺反应物的空间体积极大地影响了催化效率和区域选择性。该策略适用于广泛的底物,并适用于一锅克级合成。此外,还发现非对映选择性地引入β-甲硅烷基是可行的(dr高达71:29)。
A temporary-bridge strategy for enantioselective organocatalyzed synthesis of aza-seven-membered rings
We report the first enantioselectiveorganocatalyzeddominosynthesis of azepane moieties. This temporary-bridge strategy is based on a conceptually original annulation of ambident electrophilic and 1,4-bis-nucleophilic alpha-ketoamides with 1,3-bis-electrophilic enals. The obtained oxygen-bridged azepanes can be selectively transformed into optically active azepanone, azepanol or azepanedione derivatives