Regioselective Synthesis of Substituted Triazolium Salts via 1,3-Dipolar Cycloaddition Reactions
作者:Atef M. Amer
DOI:10.1007/s00706-003-0041-1
日期:2003.12.1
The regioselectivity of 1,3-dipolar cycloaddition reactions of 1-aza-2-azoniaallenesalts with α,β-unsaturated nitriles such as acrylonitrile or cyclohexylidene acetonitrile afforded only 1,2,4-triazolium salts via addition to the nitrile group, while the other expected pyrazolium salts were not observed. Moreover, 1-aza-2-azonia-allene salts reacted with other competitive systems such as α-iminonitrile
A facile route to poly[1-(2,4,6-trichlorophenyl)-1H-1,2,4-triazol-5-yl]alkane derivatives
作者:Quanrui Wang、Haiyan Yang、Yi Liu、Zongbiao Ding、Fenggang Tao
DOI:10.1039/b110059a
日期:2002.3.25
The synthesis of the tetrakis2-[1-(2,4,6-trichlorophenyl)-1H-1,2,4-triazol-5-yl]ethoxymethyl}methane derivatives 5a–c, 6 and 7, and the nitrotris2-[1-(2,4,6-trichlorophenyl)-1H-1,2,4-triazol-5-yl]ethyl}methane derivatives 9a–c, 10 and the picrate 11 has been accomplished by reaction of the 1-aza-2-azoniaallene salts 3 with either the aliphatic tetranitrile 1 or trinitrile 8, in high yields; the X-ray crystal structure of 5b is also reported.