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