A copper‐catalyzed decarboxylativeamination/hydroaminationsequence of propargylic carbamates with various nucleophiles is described for the first time. It features an earth‐abundant metal catalyst, mild reaction conditions, and high efficiency. Further treatments of the resultant key intermediates using an acid or a base in one pot enable the controllable and divergent synthesis of two types of functionalized
Enantioselective synthesis of benzazepinoindoles bearing trifluoromethylated quaternary stereocenters catalyzed by chiral spirocyclic phosphoric acids
作者:Xuejian Li、Di Chen、Haorui Gu、Xufeng Lin
DOI:10.1039/c4cc02295e
日期:——
SPA-catalyzed iso-Pictet–Spengler reaction of C-2-linked o-aminobenzylindoles and trifluoromethyl ketones for construction of optically enriched benzazepinoindole derivatives has been realised.
An Efficient Synthesis of Functionalized 2-Oxoindole Derivatives by Organocatalytic Z/E-Selective Benzylic Functionalization of (o-Aminobenzyl)indoles with Isatins
作者:Qiong Wu、Feng Shi、Jing Liang、Hong-Hao Zhang、Cong-Shuai Wang
DOI:10.1055/s-0036-1588297
日期:——
of (o-aminobenzyl)indoles. An efficient method has been established for the synthesis of functionalized 2-oxoindole derivatives through chemospecific benzylic functionalization of (o-aminobenzyl)indoles with isatins. This protocol not only provides ready access to functionalized 2-oxoindole derivatives in high yields (≤97%) and excellent Z/E-selectivities (Z/E > 95:5), but also serves as a good example
摘要 已经建立了一种有效的方法,该方法用于通过(o-氨基苄基)吲哚的化学特异性苄基官能化与靛红的合成功能化的2-氧吲哚衍生物。该协议不仅可以以高产率(≤97%)和出色的Z / E选择性(Z / E > 95:5)轻松获得官能化的2-氧吲哚衍生物,而且还可以作为催化苄基官能化的一个很好的例子。 (邻氨基苄基)吲哚。 已经建立了一种有效的方法,该方法用于通过(o-氨基苄基)吲哚的化学特异性苄基官能化与靛红的合成功能化的2-氧吲哚衍生物。该协议不仅可以以高产率(≤97%)和出色的Z / E选择性(Z / E > 95:5)轻松获得官能化的2-氧吲哚衍生物,而且还可以作为催化苄基官能化的一个很好的例子。 (邻氨基苄基)吲哚。
Atroposelective Access to Oxindole-Based Axially Chiral Styrenes via the Strategy of Catalytic Kinetic Resolution
作者:Chun Ma、Feng-Tao Sheng、Hai-Qing Wang、Shuang Deng、Yu-Chen Zhang、Yinchun Jiao、Wei Tan、Feng Shi
DOI:10.1021/jacs.0c00208
日期:2020.9.16
Atroposelective synthesis of axially chiral molecules has attracted substantial attention from chemists because of the importance of such molecules. However, catalytic asymmetric synthesis of axially chiral styrenes or vinyl arenes is underdeveloped and challenging due to the low rotational barrier and weak configurationalstability of such molecules. Therefore, the development of powerful strategies for the catalytic
Both cryptolepine 1 and cryptotackieine 3 have been synthesized from 1,3-bis(2-nitrophenyl)propan-2-one. The approach to 1 involved reduction of the NO2 groups, oxidative cyclization with PhI(OAc)2, and N-methylation, whereas 3 was obtained via bromination, Favorskiirearrangement, reduction (in situ cyclization), and N-methylation.