of nickel complex, NiCl2(dppe), and a stoichiometric amount of Grignardreagent, tBuMgCl. The second protocol is a stepwise deallylation through consecutive reactions of isomerization and ozonolysis. The isomerization from N-allylazoles to N-vinylazoles is catalyzed by a ruthenium complex, HRuCl(CO)(PPh3)3, and the following ozonolysis of the derived N-vinyl intermediates affords N-unsubstituted azoles
Palladium-Catalyzed Selective Synthesis of 2-Allyltetrazoles
作者:Shin Kamijo、Tienan Jin、Yoshinori Yamamoto
DOI:10.1021/jo026147l
日期:2002.10.1
The palladium-catalyzed three-component coupling (TCC) reaction of cyano compounds, allyl methyl carbonate, and trimethylsilylazide under a catalytic amount of Pd2(dba)3.CHCl3 (2.5 mol %) and tri(2-furyl)phosphine (10 mol %) gave various kinds of 2-allyltetrazoles in good to excellent yields. A pi-allylpalladium azide complex is proposed as a key intermediate in the TCC reaction.