Palladium-Catalyzed Intramolecular Amidation of C(sp<sup>2</sup>)−H Bonds: Synthesis of 4-Aryl-2-quinolinones
作者:Kiyofumi Inamoto、Tadataka Saito、Kou Hiroya、Takayuki Doi
DOI:10.1021/jo100557s
日期:2010.6.4
A catalytic synthetic approach for the synthesis of 2-quinolinone compounds through a Pd-catalyzed C(sp2)−H functionalization/intramolecularamidation sequence is described. The cyclization process efficiently proceeds in the presence of a catalytic amount of PdCl2 and Cu(OAc)2 under an O2 atmosphere, providing practical access to a range of variously substituted 4-aryl-2-quinolinones.
Weakly Coordinating, Ketone-Directed Cp*Co(III)-Catalyzed C–H Allylation on Arenes and Indoles
作者:Md Raja Sk、Sourav Sekhar Bera、Modhu Sudan Maji
DOI:10.1021/acs.orglett.7b03440
日期:2018.1.5
regioselective monoallylation of arenes and indoles is reported using a stable and cost-effective high-valent cobalt(III)-catalyst to access several important molecular building blocks. The allylation proceeds smoothly with a variety of substrates in the presence of various electron-rich and -deficient substituents. The method was applied to the formal synthesis of an ancisheynine alkaloid, a highly conjugated
Selective C(sp3)-C(sp2) bond construction is of central interest in chemical synthesis. Despite the success of classic cross-coupling reactions, the cross-dehydrogenative coupling between inert C(sp3)-H and C(sp2)-H bonds represents an attractive alternative toward new C(sp3)-C(sp2) bonds. Herein, we establish a selective inter- and intramolecular C(sp3)-H arylation of alcohols with nondirected arenes
A Bu
<sub>4</sub>
N[Fe(CO)
<sub>3</sub>
(NO)]‐Catalyzed Hemetsberger–Knittel Indole Synthesis
作者:Aslihan Baykal、Bernd Plietker
DOI:10.1002/ejoc.201901864
日期:2020.3.8
The anionic Fe complex Bu4N[Fe(CO)3(NO)] catalyzes the denitrogenative C(sp3)–H amination of a variety of aryl vinyl azides to the corresponding indoles in good to excellent yields.
阴离子Fe络合物Bu 4 N [Fe(CO)3(NO)]催化多种芳基乙烯基叠氮化物对相应的吲哚进行脱氮C(sp 3)-H胺化反应,收率很好。
Zinc-Catalyzed Alkyne Oxidation/CH Functionalization: Highly Site-Selective Synthesis of Versatile Isoquinolones and β-Carbolines
作者:Long Li、Bo Zhou、Yong-Heng Wang、Chao Shu、Yi-Fei Pan、Xin Lu、Long-Wu Ye
DOI:10.1002/anie.201502553
日期:2015.7.6
An efficient zinc(II)‐catalyzed alkyne oxidation/CH functionalization sequence was developed, thus leading to highly site‐selective synthesis of a variety of isoquinolones and β‐carbolines. Importantly, in contrast to the well‐established gold‐catalyzed intermolecular alkyne oxidation, over‐oxidation can be completely suppressed in this system and the reaction most likely proceeds by a Friedel–Crafts‐type
一种有效的锌(II) -催化的炔氧化/ C ħ官能序列被开发,因此导致多种异喹诺酮和β咔啉的高度位点选择性合成。重要的是,与公认的金催化的分子间炔烃氧化相反,该体系中的过氧化可以被完全抑制,并且反应很可能通过Friedel-Crafts型途径进行。描述了力学研究和理论计算。