在重要的化学反应中具有高活性和选择性的纳米结构和可重复使用的 3d 金属催化剂是非常需要的。在这里,开发了一种钴催化剂,用于通过还原胺化反应合成伯胺,使用氢气作为还原剂,易处理的氨水溶解在水中,作为氮源。催化剂在非常温和的条件下运行(1.5 mol% 催化剂负载,50 °C 和 10 bar H 2压力)并优于市售的贵金属催化剂(Pd、Pt、Ru、Rh、Ir)。观察到广泛的范围和非常好的官能团耐受性。高活性的关键似乎是使用的载体:一种 N 掺杂的无定形碳材料,具有小的和乱层无序的石墨域,它是微孔的,具有双峰尺寸分布,并且在孔中具有基本的 NH 官能团。
In Vitro Intrinsic Clearance-Based Optimization of <i>N</i><sup>3</sup>-Phenylpyrazinones as Corticotropin-Releasing Factor-1 (CRF<sub>1</sub>) Receptor Antagonists
作者:Richard A. Hartz、Vijay T. Ahuja、Maria Rafalski、William D. Schmitz、Allison B. Brenner、Derek J. Denhart、Jonathan L. Ditta、Jeffrey A. Deskus、Eddy W. Yue、Argyrios G. Arvanitis、Snjezana Lelas、Yu-Wen Li、Thaddeus F. Molski、Harvey Wong、James E. Grace、Kimberley A. Lentz、Jianqing Li、Nicholas J. Lodge、Robert Zaczek、Andrew P. Combs、Richard E. Olson、Ronald J. Mattson、Joanne J. Bronson、John E. Macor
DOI:10.1021/jm900302q
日期:2009.7.23
identified as potent and orally active corticotropin-releasingfactor-1 (CRF1) receptorantagonists. Selected compounds proved efficacious in an anxiety model in rats; however, pharmacokinetic properties were not optimal. In this article, we describe an in vitrointrinsicclearance-based approach to the optimization of pyrazinone-based CRF1receptorantagonists wherein sites of metabolism were identified
3-Disubstituted N-phosphorylated aziridines except N-phosphorylated cyclohexenimine (4) do not react under the described conditions. Copper-mediated reaction of 2-phenyl-N-(diethoxyphosphoryl)aziridine (7) with Grignard reagents affords a mixture of regioisomers (8) and (9) but still with the preference of ring-opening at the carbon of lesser substitution.