Cobalt-Catalyzed Selective Synthesis of Isoquinolines Using Picolinamide as a Traceless Directing Group
作者:Changsheng Kuai、Lianhui Wang、Bobin Li、Zhenhui Yang、Xiuling Cui
DOI:10.1021/acs.orglett.7b00702
日期:2017.4.21
first been employed as a traceless directing group for the cobalt-catalyzed oxidative annulation of benzylamides with alkynes to synthesize isoquinolines throughC–H/N–H bonds activation. Oxygen is used as a terminal oxidant. This protocol exhibits good functional group tolerance and excellent regioselectivity. Both terminal and internalalkynes can be efficiently applied to this catalytic system as substrates
The air‐stable and inexpensive Ni(dppe)Cl2 along with Et3N efficiently catalyzes the iminoannulation of alkynes at room temperature, allowing for the preparation of important 3,4‐disubstituted and 3‐substituted isoquinolines in high yields with complete regioselectivity. These annulation reactions feature a broad substrate scope, easy scalability, operational simplicity, and excellent practicality
Efficient copper(I)-catalyzed, microwave-assisted, one-pot synthesis of 3,4-diaryl isoquinolines
作者:Zhang Hu、Li-Li Ou、Si-Dong Li、Lei Yang
DOI:10.1007/s11164-013-1462-z
日期:2015.6
An efficient copper-catalyzed, microwave-assisted, one-pot reaction has been developed for synthesis of 3,4-diaryl isoquinolines. The reaction was performed in two steps via a CuI/2,2′-biimidazole-catalyzed tandem process from N-tert-butyl-o-iodobenzaldimine and a terminal aryl alkyne, followed by addition of an aryl iodide. A variety of 3,4-diaryl isoquinolines have been obtained in moderate to good
Palladium-Catalyzed Synthesis of Indoles and Isoquinolines with <i>in Situ</i> Generated Phosphinimine
作者:Qi Zhou、Zhikun Zhang、Yujing Zhou、Shichao Li、Yan Zhang、Jianbo Wang
DOI:10.1021/acs.joc.6b01864
日期:2017.1.6
A palladium-catalyzed synthesis of polysubstituted indoles and isoquinolines through the coupling of aryl bromides with 2-alkynyl arylazides or 2-alkynyl benzylazides has been developed. This method provides straightforward access to indoles and isoquinolines with high efficiency and excellent functional group compatibility. In this transformation, the iminophosphorane in situ generated from azides
Synthesis of highly substituted isoquinolines/isoquinolones by ruthenium (<scp>ii</scp>)-catalyzed reaction of benzyl/α-methyl benzyl/benzoyl isocyanates with diaryl alkynes
An efficient and novel method has been developed for the synthesis of highly substituted isoquinolines/isoquinolones by Ru(II)-catalyzed intermolecular oxidative annulation of benzyl/benzoyl isocyanates with diaryl alkynes in the presence of Cs2CO3 as base and Cu(OTf)2 as an oxidant at 120 °C for 1 h.
在 Cs 2 CO 3作为碱和 Cu(OTf)存在下,通过 Ru( II ) 催化的苄基/苯甲酰基异氰酸酯与二芳基炔烃的分子间氧化环化,开发了一种有效且新颖的合成高取代异喹啉/异喹诺酮的方法2作为氧化剂在 120 °C 下处理 1 小时。