报道了带有三个七元环的C 3对称的螺旋桨状多环芳烃的合成和结构。从苯并[ c ]萘并[2,1- p ]丙烯在三个步骤中完成合成,包括钯催化的分子内C–H芳基化反应以形成七元环。三个七个七元环部分和三个[4] ic烯部分的螺旋度(P / M)的组合提供了24个可能的构象异构体,并且通过1 H NMR光谱观察到了两个相对稳定的构象。
报道了带有三个七元环的C 3对称的螺旋桨状多环芳烃的合成和结构。从苯并[ c ]萘并[2,1- p ]丙烯在三个步骤中完成合成,包括钯催化的分子内C–H芳基化反应以形成七元环。三个七个七元环部分和三个[4] ic烯部分的螺旋度(P / M)的组合提供了24个可能的构象异构体,并且通过1 H NMR光谱观察到了两个相对稳定的构象。
Mild, visible light-mediated decarboxylation of aryl carboxylic acids to access aryl radicals
作者:L. Candish、M. Freitag、T. Gensch、F. Glorius
DOI:10.1039/c6sc05533h
日期:——
Herein we present the first example of aryl radical formation via the visible light-mediated decarboxylation of aryl carboxylic acids using photoredox catalysis.
在本文中,我们介绍了使用光氧化还原催化作用通过可见光介导的芳基羧酸脱羧形成芳基的第一个例子。
A site-selective and stereospecific cascade Suzuki–Miyaura annulation of alkyl 1,2-bisboronic esters and 2,2′-dihalo 1,1′-biaryls
作者:Suzanne Willems、Georgios Toupalas、Julia C. Reisenbauer、Bill Morandi
DOI:10.1039/d1cc00648g
日期:——
A cascade Suzuki–Miyaura cross-coupling giving rise to 9,10-dihydrophenanthrenes has been developed. Using biaryls with unsymmetrical substitution-pattern full site-selectivity was observed. Furthermore, this cross-coupling of an alkyl 1,2-bisboronic pinacol ester proceeds through the challenging coupling of a secondary boronate with complete stereoretention.
作者:Heng Zhang、Rong-Bin Hu、Xiao-Yu Zhang、Shi-Xia Li、Shang-Dong Yang
DOI:10.1039/c4cc01238k
日期:——
A novel and efficient Pd-catalyzed C–H acetoxylation is described. The approach uses R2(O)P as a directing group to synthesize various substituted 2′-phosphoryl biphenyl-2-OAc compounds.
Visible-Light-Promoted, Catalyst-Free Gomberg–Bachmann Reaction: Synthesis of Biaryls
作者:Juyoung Lee、Boseok Hong、Anna Lee
DOI:10.1021/acs.joc.9b00557
日期:2019.7.19
Biaryls were synthesized via a novel visible-light-promoted Gomberg–Bachmann reaction that does not require a photosensitizer or any metal reagents. The formation of an electron donor–acceptor complex between aryl diazonium salts and pyridine allows, under visible-light irradiation, the synthesis of biaryls in moderate-to-high yields.
Disclosed are compounds having the formula (I): wherein the R
1
, R
2
, R
3
, X, Y, A, L, and G are defined herein. These compounds bind to aspartic proteases to inhibit their activity and are useful in the treatment or amelioration of diseases associated with aspartic protease activity. Also disclosed are methods of use of the compounds of Formula I for ameliorating or treating aspartic protease related disorders in a subject in need thereof.