Transition-Metal-Free Direct Alkylation of Aryl Tetrazoles via Intermolecular Oxidative C–N Formation
作者:Liang Wang、Kaiqiang Zhu、Qun Chen、Mingyang He
DOI:10.1021/jo502283h
日期:2014.12.5
A transition-metal-free synthetic approach for constructing alkylated aryl tetrazoles has been developed using n-Bu4NI as the catalyst and t-BuOOH as the oxidant. It involves the direct C-N bond formation through sp(3) C-H activation. A wide range of benzylic C-H substrates (or alkyl ethers) and aryl tetrazoles undergo this reaction smoothly to deliver the corresponding products in good yields.
THE REACTION OF NITRILES WITH HYDRAZOIC ACID: SYNTHESIS OF MONOSUBSTITUTED TETRAZOLES
作者:JOSEPH S. MIHINA、ROBERT M. HERBST
DOI:10.1021/jo01151a027
日期:1950.9
Alkylation of 5-substituted NH-tetrazoles by alcohols in the superacid CF3SO3H
作者:Anna D. Lisakova、Dmitry S. Ryabukhin、Rostislav E. Trifonov、Vladimir A. Ostrovskii、Aleksander V. Vasilyev
DOI:10.1016/j.tetlet.2015.11.005
日期:2015.12
Reactions of 5-substituted NH-tetrazoles with alcohols in the superacid CF3SO3H have been studied. Both the structure of the tetrazole and the nature of alcohol were found to dramatically influence the selectivity of the reaction and yields of products. Tetrazoles bearing phenyl, electron-donating aryl, or benzyl groups at the 5-position, have been alkylated using various alcohols (including MeOH and EtOH) in CF3SO3H upon heating at 60 degrees C for 0.3-12 h to afford 2-alkyl-2H-tetrazoles in 30-98% yields. (C) 2015 Elsevier Ltd. All rights reserved.