| Abstract: | The mass-spectrometric fragmentation of the positive and negative molecular ions of diptocarpidine and diptocarpiline and of two model compounds have been studied, and it has been shown that the formation of the fragmentary ions takes place both by direct bond cleavage and with the involvement of complex skeletal rearrangements. The composition of the rearranged ions formed from M+ has been confirmed with the aid of high-resolution mass spectrometry. An intramolecular interaction of the this (sulfoxy) and urea groups as a consequence of the existance of the molecules under investigation in a folded conformation has been established.Institute of Chemistry Bashkir Branch USSR Academy of Sciences, Ufa. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 390–396, May–June, 1988. |
