General Synthesis of Secondary Alkylamines by Reductive Alkylation of Nitriles by Aldehydes and Ketones
作者:Timon Schönauer、Sabrina L. J. Thomä、Leah Kaiser、Mirijam Zobel、Rhett Kempe
DOI:10.1002/chem.202004755
日期:2021.1.21
may permit solving challenges of chemical synthesis. We report here on a catalytic C−N bond formation reaction—the reductivealkylation of nitriles. Aldehydes or ketones and nitriles, all abundantly available and low‐cost starting materials, undergo a reductive coupling to form secondary alkylamines and inexpensive hydrogen is used as the reducing agent. The reaction has a very broad scope and many functional
New bioregulators of gibberellin biosynthesis in Gibberella fujikuroi
作者:Linda C. Echols、V.P. Maier、Stephen M. Poling、Philip R. Sterling
DOI:10.1016/s0031-9422(00)84160-6
日期:1981.3
Abstract A number of new inhibitors of gibberellin (GA) biosynthesis in Gibberellafujikuroi are reported, including secondary, tertiary and quaternary amines. Octyltrimethylammonium iodide and 3-chloropropyltrimethylammonium iodide were equally as effective as 2-chloroethyltrimethylammonium chloride (CCC). At least two of the other inhibitors reported, diethyloctylamine hydrochloride and octyltriethylammonium
develop an efficient and workable method for the reduction of imines via hydroboration with HBpin. The low cost and non-toxic Fe exhibits high catalytic activity to this hydroboration. A large range of aldimines comprising diverse aryl groups, alkyl groups and heterocycles proceed the hydroboration well to yield secondary amines in good to excellent yields. Kinetic mechanistic studies indicate the importance
我们开发了一种有效且可行的方法,用于通过 HBpin 硼氢化还原亚胺。低成本且无毒的Fe对这种硼氢化反应具有高催化活性。包含不同芳基、烷基和杂环的大范围醛亚胺可以很好地进行硼氢化,以良好至极好的产率产生仲胺。动力学机制研究表明 Fe 在 HBpin 转化为活性物质中的重要性。通过该策略制备几种市售药物突出了其在药物化学中的潜在应用。