C–H Activation Guided by Aromatic N–H Ketimines: Synthesis of Functionalized Isoquinolines Using Benzyl Azides and Alkynes
摘要:
Aromatic N-H ketimines were in situ generated from various benzylic azides by ruthenium catalysis for the subsequent Rh-catalyzed annulation reaction with alkynes to give the corresponding isoquinolines. In contrast to conventional synthetic methods for aromatic NH ketimines, our protocol works under mild and neutral conditions, which enabled the synthesis of isoquinolines having various functionalities such as carbonyl, ester, alkenyl, and ether groups. In addition, the imidates generated from alpha-azido ethers were successfully used for the synthesis of 1-alkoxyisoquinolines.
Radical Azidonation of Benzylic Positions with Iodonium Azide
摘要:
Introduction of an azido substituent at the α position of benzyl ethers can be achieved by treating them with IN3 in refluxing acetonitrile. Some of the products obtained after 20 min-5 h are given.
Substitution of α-azido ethers with Grignard reagents and its use in combinatorial chemistry
作者:Mukulesh Baruah、Mikael Bols
DOI:10.1039/b110428b
日期:2002.2.6
α-Azidobenzyl ethers were reacted with alkyl or arylGrignard reagents in toluene to produce α-alkylbenzyl or diarylmethyl ethers in 82â94% yield. α-Azidobenzyl ethers were also reacted with multicomponent Grignard reagents to produce libraries of α-alkylbenzyl ethers.