[Pd(Cl)2{P(NC5H10)(C6H11)2}2]-A Highly Effective and Extremely Versatile Palladium-Based Negishi Catalyst that Efficiently and Reliably Operates at Low Catalyst Loadings
作者:Jeanne L. Bolliger、Christian M. Frech
DOI:10.1002/chem.201001201
日期:——
electronically activated, non‐activated, deactivated, stericallyhindered, heterocyclic, and functionalized aryl bromides with various (also heterocyclic) arylzinc reagents, typically within a few minutes at 100 °C in the presence of just 0.01 mol % of catalyst. Aryl bromides containing nitro, nitrile, ether, ester, hydroxy, carbonyl, and carboxyl groups, as well as acetals, lactones, amides, anilines,
[Pd(Cl)2 P(NC 5 H 10)(C 6 H 11)2 } 2 ](1)已通过使市售的[Pd(cod)(Cl)2 ]反应定量制备。室温下在几分钟内在N 2中与易于制备的1-(二环己基膦酰基)哌啶在甲苯中的环辛二烯)。综合大楼1已被证明是极佳的Negishi催化剂,能够将各种电子活化,非活化,失活,空间受阻,杂环和官能化的芳基溴化物与各种(也是杂环的)芳基锌试剂定量偶联,通常在几分钟内即可完成。 100°C,仅存在0.01 mol%的催化剂。含有硝基,腈,醚,酯,羟基,羰基和羧基的芳基溴化物,以及缩醛,内酯,酰胺,苯胺,烯烃,羧酸,乙酸,吡啶和嘧啶已被成功用作偶联伙伴。此外,在两个反应伙伴中都可以容忍电子和空间变化。实验观察强烈表明分子机制是有效的。
Facile construction of pyrrolo[1,2-b]isoquinolin-10(5H)-ones via a redox-amination–aromatization–Friedel–Crafts acylation cascade reaction and discovery of novel topoisomerase inhibitors
An efficient redox-amination-aromatization-Friedel-Crafts acylation cascade process from trans-4-hydroxyproline and 2-formylbenzoic acids has been developed for the synthesis of pyrrolo[1,2-b]isoquinolin-10(5H)-ones. Compound 3h was identified as a new potent dual topoisomerase I/II inhibitor.
Negishi cross-coupling reaction catalyzed by an aliphatic, phosphine based pincer complex of palladium. biaryl formation via cationic pincer-type PdIV intermediates
作者:Roman Gerber、Olivier Blacque、Christian M. Frech
DOI:10.1039/c1dt10398a
日期:——
The aliphatic, phosphine-based pincercomplex [(C10H13-1,3-(CH2P(Cy2)2)Pd(Cl)] (1) is a highlyactiveNegishicatalyst, enable to quantitatively couple various electronically activated, non-activated, deactivated, sterically hindered and functionalized aryl bromides with various diarylzinc reagents within short reaction times and low catalyst loadings. Experimental observations strongly indicate that
Hydroarylation of Arynes Catalyzed by Silver for Biaryl Synthesis
作者:Nam-Kyu Lee、Sang Young Yun、Phani Mamidipalli、Ryan M. Salzman、Daesung Lee、Tao Zhou、Yuanzhi Xia
DOI:10.1021/ja500292x
日期:2014.3.19
A new biaryl synthesis via silver-catalyzed hydroarylation of arynes from acyclic building blocks with unactivated arenes in intra- and intermolecular manners has been developed. The previously observed Diels-Alder reactions of arynes with arene were not observed under the current silver-catalyzed conditions. Deuterium scrambling and DFT calculations suggest a stepwise electrophilic aromatic substitution
Synthesis of 3-Benzylphthalide Derivatives by Using a TDAE
Strategy
作者:Patrice Vanelle、Maroua Ibrahimi、Omar Khoumeri、Raoudha Abderrahim、Thierry Terme
DOI:10.1055/a-1290-8349
日期:2021.2
A one-pot synthesis of new 3-benzylphthalide derivatives was developed by using a strategy based on tetrakis(dimethylamino)ethylene (TDAE). The reactions in the presence of TDAE of substituted benzyl chlorides with methyl 2-formylbenzoate or of substituted methyl-2-formylbenzoates with 4-nitrobenzyl chloride furnished the corresponding isobenzofuran-1(3H)-one products in moderate to good yields.