A 13C n.m.r. study of the biosynthesis of lupinine and sparteine
Abstract
The mode of incorporation, into lupinine and into sparteine, of cadaverine, intramolecularly doubly labelled with 15N and with 13C at the C-atom adjacent to 15N, was determined by 13C n.m.r. spectroscopy; lupinine is generated from two, and sparteine from three cadaverine-derived C5-units, each by a route which excludes intermediate with C2v symmetry.