4-(Azulen-1-yl) six-membered heteroaromatics substituted in 2- and 6- positions with 2-(2-furyl)vinyl, 2-(2-thienyl)vinyl or 2-(3-thienyl)vinyl moieties
作者:Liviu Birzan、Mihaela Cristea、Constantin C. Draghici、Victorita Tecuceanu、Anamaria Hanganu、Eleonora-Mihaela Ungureanu、Alexandru C. Razus
DOI:10.1016/j.tet.2017.03.035
日期:2017.4
of pyridinium salts, which occur with good results in less delocalized electronic systems, do not take place when applied to the above obtained pyrylium salts. Therefore, as starting material 4-(azulen-1-yl)-1-(n-butyl)-2,6-dimethylpyridinium perchlorate was used, which was condensed with heteroarylcarboxaldehydes. These compounds were completely characterized and some of their spectra were discussed
4-(Azulen-1-yl) six-membered heteroaromatics substituted with thiophen-2-yl or furan-2-yl moieties in 2 and 6 positions
作者:Alexandru C. Razus、Liviu Birzan、Mihaela Cristea、Victorita Tecuceanu、Anamaria Hanganu、Cristian Enache
DOI:10.1002/jhet.684
日期:2011.9
Pyranylium perchlorates with azulen‐1‐yl moiety in 4‐position and thiophen‐2‐yl or furan‐2‐yl in 2 and 6‐positions were obtained by the substitution of 4‐chloro corresponding salts with azulenes. The pyranyliumsalts are used as starting materials for the synthesis of pyridine and pyridinium salts. The products were characterized and for pyridines pKa was spectroscopically determined. Several attempts