Study of the conformational states of amino-alcohol derivatives of some alkaloids and bases and their protonated forms and quaternary salts

Summary 1. Salsoline, salsolidine, ephedrine, pseudoephedrine, tetrahydroquinoline, and decahydroquinoline have been condensed with ethylene oxide and the corresponding amino alcohols have been obtained.2. The conformational states and spatial structures of the compounds synthesized and their protonated forms and methiodides have been studied by IR and PMR spectroscopy. It has been shown that because of the rapid conversion of the saturated parts of the molecules of the bases and inversion processes, several stable spatial forms of the N-derivatives with quarternized nitrogen atoms exist in solutions.V. I. Lenin Tashkent State University. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 486–492, July–August, 1974.