Enantioselective biocatalytic hydrolysis of β-aminonitriles to β-amino-amides using Rhodococcus rhodochrous ATCC BAA-870
摘要:
A range of beta-aminonitriles (3-amino-3-phenylpropanenitrile and derivatives) were synthesised by reaction of various benzonitriles with acetonitrile and subsequent reduction of the resulting acrylonitrile products. These compounds were hydrolysed to the corresponding amides using the nitrile biocatalytic activity of Rhodococccus rhodochrous ATCC BAA-870. Results showed that the nitrile hydratase enzyme was enantioselective for these compounds, in particular 3-amino-3-p-tolylpropanenitrile and 3-amino-3-(4-methoxyphenyl)propanenitrile and the corresponding amides (up to 85% in one case). The reactions were performed at pH 9.0 after initial attempts at pH 7.0 were unsuccessful, most likely as a result of protonation of the 3-amino group at the lower pH. (C) 2012 Elsevier B.V. All rights reserved.
Annulation of β-Enaminonitriles with Alkynes via Rh<sup>III</sup>-Catalyzed C–H Activation: Direct Access to Highly Substituted 1-Naphthylamines and Naphtho[1,8-<i>bc</i>]pyridines
作者:Haili Wang、Hong Xu、Bin Li、Baiquan Wang
DOI:10.1021/acs.orglett.8b02341
日期:2018.9.21
A Cp*RhIII-catalyzed oxidative annulation of β-enaminonitriles with alkynes was reported to achieve selective synthesis of polysubstituted 1-naphthylamines and naphtho[1,8-bc]pyridines via multiple C–Hactivations. Assisted by a naphthylamine NH2 group, 1-naphthylamines were also readily cyclized to produce naphtho[1,8-bc]pyridines. In addition, the obtained naphtho[1,8-bc]pyridine derivatives exhibit
据报道,Cp * Rh III催化的炔烃对β-烯腈的氧化环化反应通过多种C-H活化选择性地合成了多取代的1-萘胺和萘[1,8- bc ]吡啶。在萘胺NH 2基团的辅助下,1-萘胺也很容易被环化以生成萘[1,8- bc ]吡啶。此外,所获得的萘并[1,8- bc ]吡啶衍生物在固态下表现出强烈的荧光。