Synthesis and base-pairing of self-complementary mesomeric betaines of guanine
Substitution of 8-H of guanine-N-oxide was accomplished by pyridine, 4-dimethylaminopyridine and acetyl chloride, respectively, to give a cationic purine base after hydrolysis. Deprotonation formed mesomeric betaines of guanine. ESI mass spectrometry and