报道了一种合成具有 V 形分子结构的环氧二苯并 [ b , f ] [1,5]重氮辛的新方法。这种独特的方法基于前所未有的碱催化、无溶剂自缩合和氟化邻苯二甲酸的交叉缩合-氨基苯酮。通过 X 射线分析和手性光学方法独立地证实了新合成的重氮辛的结构。重氮辛支架的刚性允许将外消旋体分离成单个对映异构体,这些对映异构体在高达 140 °C 时具有热稳定性。此外,通过进行一系列典型的转化,包括过渡金属催化的反应,在不影响双半胺亚基的情况下进行,证明了重氮辛支架的惰性。
The homocamptothecin (hCPT) represents a new class of topoisomerase inhibitor which combines enhanced plasma stability and strong antitumor activity. Fluorine imparts desirable characteristics to drugs by modulating both the pharmacokinetics and pharmacodynamic properties of a drug. Therefore, in an attempt to improve the antitumor activity of homocamptothecins, seven new 7-trifluoromethylated homocamptothecin
The first proline-catalyzed Friedlander annulation for the synthesis of 2-substituted 4-trifluoromethyl quinoline derivatives is described. Excellent re gio selectivity as well as good yields were shown in a variety of cases, and a tandem aldol-cyclization pathway might be involved. ((c) Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008).
Design and Atroposelective Construction of IAN analogues by Organocatalytic Asymmetric Heteroannulation of Alkynes
作者:Lei Zhang、Jiahua Shen、San Wu、Guofu Zhong、Yong‐Bin Wang、Bin Tan
DOI:10.1002/anie.202010598
日期:2020.12.14
atroposelective strategy for accessing enantioenriched axially chiral IAN analogues was developed for the first time. A class of novel atropisomeric C2‐arylquinoline skeletons were synthesized with high enantiocontrol via chiral phosphoric‐acid‐catalyzed heteroannulation of in situ generated vinylidene ortho‐quinone methide (VQM) intermediates with ortho‐aminophenones. The strategy tolerated a broad
Selective Metal-Controlled Synthesis of Trifluoromethylated (Indolin-2-ylidene)methyl- and Quinolin-3-ylphosphonates
作者:Alexander Yu. Mitrofanov、Valentina A. Bychkova、Sergey E. Nefedov、Irina P. Beletskaya
DOI:10.1021/acs.joc.0c00913
日期:2020.11.20
Metal-catalyzed (Cu, Ag, Au) reactions of alkynylphosphonates with 1-(2-aminophenyl)-2,2,2-trifluoroethan-1-ones were developed. Terminal alkyne diethyl ethynylphosphonate reacted with ketones to give different products depending on the catalyst used. With a CuI/PPh3 catalytic system, the formation of CF3-containing indoline derivatives was observed with good yields. The use of AgSbF6 as a catalyst
Phosphine-Catalyzed [3+2] or [4+2] Cycloaddition/S<sub>N</sub>
2 Substitution Domino Reaction of <i>ortho</i>
-Aminotrifluoroaceto- phenone Derivatives with Hex-3-yn-2-one: Preparation of Functionalized 1-Benzazepine Compounds
作者:Yao-Liang Sun、Yin Wei、Min Shi
DOI:10.1002/adsc.201700778
日期:2017.9.18
In this paper, we disclose a novel strategy for the phosphine‐catalyzed cycloaddition/SN2 substitution domino reaction, giving functionalized O‐bridged benzoazepine and benzoxazepine derivatives in moderate to good yields. Changing the N–H protecting group of ortho‐aminotrifluoroacetophenone derivatives gave different bridged‐ring products in one step.
在本文中,我们公开了膦催化的环加成/ S N 2取代多米诺反应的新策略,使官能化的O桥苯并a庚因和苯并x并庚因衍生物具有中等至良好的收率。一步改变邻氨基三氟苯乙酮衍生物的NH保护基,就可以得到不同的桥环产物。