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.
One-pot Synthesis of α-Alkoxy Azides from Carbonyl Compounds Catalyzed by Iron(III) Chloride
作者:Megumi Omura、Katsuyuki Iwanami、Takeshi Oriyama
DOI:10.1246/cl.2007.532
日期:2007.4.5
In the presence of alkoxytrimethylsilane and a catalytic amount of iron(III) chloride, the reaction of various carbonyl compounds with trimethylsilyl azide afforded the corresponding α-alkoxy azide...
Safe radical azidonation using polystyrene supported diazidoiodate(I)
作者:Lavinia Georgeta Marinescu、Christian Marcus Pedersen、Mikael Bols
DOI:10.1016/j.tet.2004.10.040
日期:2005.1
Aldehydes are converted to acyl azides and benzyl ethers to azido ethers by treatment with polymer supported iodine azide in MeCN at 83 degreesC. The reaction provides a safe and convenient alternative to the use of iodine azide in radical azidonations. (C) 2004 Elsevier Ltd. All rights reserved.
[EN] PHOTOSENSITIZER AND ACTIVE ENERGY RAY-CURABLE COMPOSITION<br/>[FR] PHOTOSENSIBILISATEUR ET COMPOSITION DURCISSABLE PAR RAYONNEMENT D'ÉNERGIE ACTIVE<br/>[JA] 光増感剤及び活性エネルギー線硬化性組成物
Radical substitution with azide: TMSN<sub>3</sub>–PhI(OAc)<sub>2</sub>as a substitute of IN<sub>3</sub>
作者:Christian Marcus Pedersen、Lavinia Georgeta Marinescu、Mikael Bols
DOI:10.1039/b500037h
日期:——
TMSN3 and PhI(OAc)2 were found to promote high-yield azide substitution of ethers, aldehydes and benzal acetals. The reaction is fast and occurs at zero to ambient temperature in acetonitrile. However, it is essential for the reaction that TMSN3 is added subsequent to the mixture of PhI(OAc)2 and the substrate. A primary deuterium kinetic isotope effect was found for the azidonation of benzyl ethers
C–H Activation Guided by Aromatic N–H Ketimines: Synthesis of Functionalized Isoquinolines Using Benzyl Azides and Alkynes
作者:Sreya Gupta、Junghoon Han、Yongjin Kim、Soon W. Lee、Young Ho Rhee、Jaiwook Park
DOI:10.1021/jo501465q
日期:2014.10.3
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.