Homoleptic lanthanide complex Y[N(TMS)2]3 is an efficient homogeneous catalyst for the hydroboration reduction of secondary amides and tertiary amides to corresponding amines. A series of amides containing different functional groups such as cyano, nitro, and vinyl groups were found to be well-tolerated. This transformation has also been nicely applied to the synthesis of indoles and piribedil. Detailed
Deuterated unsaturated fragments have gained increasing attention because of their roles in understanding reaction mechanisms and pharmaceutical potentials. Due to the difficulties of the existing synthetic methods, it is highly desirable to develop an effective, highly site selective, and environmentally friendly method to introduce deuterium into unsaturated fragments. Herein, we describe a biocatalytic
氘代不饱和片段因其在理解反应机制和药物潜力方面的作用而受到越来越多的关注。由于现有合成方法的困难,非常希望开发一种有效的、高位点选择性和环境友好的方法将氘引入不饱和片段中。在此,我们描述了一种生物催化氢同位素交换 (HIE) 反应,由来自黑曲霉( An Fdc)的工程化阿魏酸脱羧酶催化不饱和片段形成 C(sp 2 )-D 键,该酶自然催化肉桂酸的可逆转化为苯乙烯和CO 2。一个Fdc 显示出有希望的合成潜力和广泛的底物相容性,提供了一系列具有高产率、位点选择性和 D 掺入的氘代芳族杂环和苯乙烯衍生物。
Rhodium-catalyzed regioselective direct C–H arylation of indoles with aryl boronic acids
作者:Liang Wang、Xing Qu、Zhan Li、Wang-Ming Peng
DOI:10.1016/j.tetlet.2015.04.015
日期:2015.6
A highly efficient Rh(III)-catalyzed direct C–H arylation of indoles with arylboronicacids under mild conditions has been developed. The methodology features wide substrate scope and excellent functional group compatibility (34 examples, up to 99% yield). The arylated products can also be conveniently transformed into biologically active polycyclic indole derivatives.
We report a chelation-assisted C–H arylation of various indoles with sterically and electronically diverse (hetero)arylsilanes enabled by cost-effective Cp*-free cobaltcatalysis. Key to the success of this strategy is the judicious choice of copper(II) fluoride as a bifunctional sliane activator and catalyst reoxidant. This methodology features a broad substrate scope and good functional group compatibility
The manganese-catalyzed α-fluoroalkenylation of arenes via C–Hactivation and C–F cleavage has been described. This protocol provides a very useful method for the synthesis of monofluoroalkenes with predominant unconventional E-isomer selectivity which complements the existing strategies for the access to these molecular architectures. In addition, the selectivity of β-defluorination in the catalytic