Visible‐Light‐Induced Controlled Oxidation of
<i>N</i>
‐Substituted 1,2,3,4‐Tetrahydroisoquinolines for the Synthesis of 3,4‐Dihydroisoquinolin‐1(2
<i>H</i>
)‐ones and Isoquinolin‐1(2
<i>H</i>
)‐ones
作者:Ajay H. Bansode、Gurunath Suryavanshi
DOI:10.1002/adsc.202001266
日期:2021.3.2
controlled oxidation of N‐substituted 1,2,3,4‐tetrahydroisoquinolines is developed for the synthesis of 3,4‐dihydroisoquinolin‐1(2H)‐ones and isoquinolin‐1(2H)‐ones. The present method feature's a broad substrate scope, good functional group tolerances, and the products were prepared in good to excellent yields. The developed methodology further demonstrated in the synthesis of isoindolo[2,1‐b] isoquinolin‐5(7H)‐one
Efficient C–N and C–Ocouplingreactions of aryl halides with amines and alcohols have been developed by using the strategy of heterogeneous visible light photoredox and nickel dual catalysis. Obviously, the joint use of inexpensive and bench-stable CdS and nickel salts, together with mild reaction conditions, makes these two transformations attractive for the synthetic community. This heterogeneous
Covalent Organic Frameworks toward Diverse Photocatalytic Aerobic Oxidations
作者:Shuyang Liu、Miao Tian、Xiubin Bu、Hua Tian、Xiaobo Yang
DOI:10.1002/chem.202100398
日期:2021.5.17
two‐dimensional covalentorganicframeworks (2D‐COFs) have become promising heterogenous photocatalysts in visible‐light‐drivenorganic transformations. Herein, a visible‐light‐driven selective aerobic oxidation of various small organic molecules by using 2D‐COFs as the photocatalyst was developed. In this protocol, due to the remarkable photocatalytic capability of hydrazone‐based 2D‐COF‐1 on molecular
Practical direct synthesis of <i>N</i>-aryl-substituted azacycles from <i>N</i>-alkyl protected arylamines using TiCl<sub>4</sub> and DBU
作者:Van Hieu Tran、Minh Thanh La、Soosung Kang、Hee-Kwon Kim
DOI:10.1039/d0ob00880j
日期:——
A noveltransformation of N-alkyl protected arylamines and cyclic ethers into N-aryl substituted azacycles is described. Alkyl groups have been used for the protection of amines in organic syntheses. In this synthesis, N-alkyl protected arylamines were reacted with cyclic ethers in the presence of TiCl4 and DBU, crucial reagents affording five- and six-membered azacycles. In particular, utilization
A metal‐ and reagent‐free, electrochemical cross‐dehydrogenative couplingreaction of N‐aryl‐tetrahydroisoquinolines with phosphites and indole was reported, providing an environmentally benign and simple approach for the construction of C–P and C–C.