Synthesis and three-dimensional structure of 2-arylidene-3-oxoquinuclidine oximes

2-Arylidene-3-oxoquinuclidine oximes were obtained from the products of condensation of 3-oxoquinuclidine with aromatic aldehydes. It is shown that three of the four theoretically possible isomers (isomerism involving the C=C and C=N bonds) are formed; their thermal stability was studied. The structures of the isomeric oximes was established on the basis of data from the ¹H and ¹³C NMR spectra and were confirmed by data from chromatographic mass spectrometry and the UV and IR spectra.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 666–674, May, 1981.