1,2-Diaminoethyl- and 1,3-diaminopropyl-derivatives of aldoses and their tautomerism

Abstract

2-Aminoethylimines and 3-aminopropylimines of aldoses have been synthesized and their structure in solutions has been investigated by 13C NMR spectroscopy. 2-Aminoethylimines usually exist as pyranoses, 3-aminopropylimines are the corresponding piperimidines while ring–ring interconversion between pyranose and piperimidine tautomers takes place in some cases.