Kinetics and mechanism of formation of isomeric 1-methyl- and 2-methyl-5-vinyltetrazoles
作者:V. A. Ostrovskii、M. E. Podkameneva、V. S. Poplavskii、R. E. Trifonov
DOI:10.1007/s11172-009-0293-y
日期:2009.10
The alkylation of 5-(β-dimethylaminoethyl)tetrazole (1) with dimethyl sulfate afforded 5-(β-dimethylaminoethyl)-1-methyltetrazole (2) and 5-(β-dimethylaminoethyl)-2-methyltetrazole (3). The exhaustivealkylation of compounds 2 and 3 at the terminal dimethylamino group gave 1-methyl-(4) and 2-methyl-5-(β-trimethylammonioethyl)tetrazole (5) methyl sulfates. The proton elimination from the α-methylene
Vinyltetrazoles: I. Synthesis of NH-unsubstituted 5-vinyltetrazole
作者:V. A. Ostrovskii、P. A. Aleshunin、V. Yu. Zubarev、E. A. Popova、Yu. N. Pavlyukova、E. A. Shumilova、R. E. Trifonov、T. V. Artamonova
DOI:10.1134/s1070428010110126
日期:2010.11
The NH-unsubstituted 5-vinyltetrazole was obtained in 55% yield by exhaustive methylation of 5-(beta-dimethylaminoethyl)tetrazole with dimethyl sulfate at the terminal dimethylamino group with the subsequent elimination of a proton from the alpha-CH2 group and Hofmann beta-cleavage of the intermediate 5-(beta-trimethylammoniumethyl)tetrazolide methyl sulfate. The microwave irradiation was shown to reduce 5-fold the time of the synthesis of the initial substrate, 5-(beta-dimethylaminoethyl)tetrazole.
Selective N(2) alkylation of tetrazole and 5-substituted tetrazoles by alcohols
作者:A. O. Koren'、P. N. Gaponik
DOI:10.1007/bf00473965
日期:1990.12
Ostrovskii; Poplavskii; Shcherbinin, Russian Journal of Organic Chemistry, 1998, vol. 34, # 6, p. 870 - 875
作者:Ostrovskii、Poplavskii、Shcherbinin
DOI:——
日期:——
KOREN, A. O.;GAPONIK, P. N., XIMIYA GETEROTSIKL. SOED.,(1990) N2, S. 1643-1647