Bu<sub>4</sub>NI-Catalyzed, Radical-Induced Regioselective <i>N</i>-Alkylations and Arylations of Tetrazoles Using Organic Peroxides/Peresters
作者:Suresh Rajamanickam、Chitranjan Sah、Bilal Ahmad Mir、Subhendu Ghosh、Garima Sethi、Vinita Yadav、Sugumar Venkataramani、Bhisma K. Patel
DOI:10.1021/acs.joc.9b02875
日期:2020.2.21
using tert-butyl hydroperoxide (TBHP) as the methyl source, alkyl diacyl peroxides as the primary alkyl source, alkyl peresters as the secondary and tertiaryalkyl sources, and aryl diacyl peroxides as the arylating source. These reactions proceed without pre-functionalization of tetrazole and in the absence of any metal catalysts. Here, peroxides serve the dual role of oxidants as well as alkylating or
Palladium- and copper-catalyzed selective arylation of 5-aryltetrazoles by diaryliodonium salts
作者:Irina P. Beletskaya、Dmitri V. Davydov、Matvey S. Gorovoy
DOI:10.1016/s0040-4039(02)01325-4
日期:2002.8
Palladium(0)-catalyzed arylation of 5-aryltetrazoles in t-BuOH at 80°C with diaryliodoniumsalts proceeds in the presence of copper(II) phenylcyclopropyl carboxylate regioselectively at the N2 position.
Convenient Synthesis of Highly Functionalized Pyrazolines via Mild, Photoactivated 1,3-Dipolar Cycloaddition
作者:Yizhong Wang、Claudia I. Rivera Vera、Qing Lin
DOI:10.1021/ol7017328
日期:2007.10.1
cycloaddition procedure was successfully developed for the synthesis of polysubstituted pyrazolines. This procedure involved the in situ generation of the reactive nitrile imine dipoles using a hand-held UV lamp at 302 nm, followed by spontaneous cycloaddition with a broad range of 1,3-dipolarophiles with excellent solvent compatibility, functional group tolerance, regioselectivity, and yield.
A synthesis of 3,5-disubstituted-1,2,4-triazoles from nitriles and 5-aryltetrazoles is reported. When 5-aryltetrazoles are triflylated in the presence of nitriles, the resulting 5-aryl-2-triflyltet...
A mild and regioselective 2-arylation of 5-substitutedtetrazoles is described. The reaction proceeds regioselectively with a variety of arylboronic acids in the presence of [Cu(OH)(TMEDA)]2Cl2 to afford 2,5-disubstituted tetrazoles. This is the first report of highly regioselective arylation of 5-alkyltetrazoles.