Collect. Czech. Chem. Commun. 1983, 48, 928-936

The synthesis and the mass spectra of 28,29,30-trinoroleanane derivatives with a double bond in the ring E or D

Jiří Protiva, Václav Křeček, Josefa Křečková, Eva Klinotová and Alois Vystrčil

Department of Organic Chemistry, Charles University, 128 40 Prague 2


A series of 28,29,30-trinor-18α-oleanane derivatives with two double bonds - 17(22) and 20(29) - was prepared. The position of the 17(22) double bond was demonstrated by partial hydrogenation of the diene on tris-triphenylphosphinerhodium chloride and by comparison of the product with an authentic sample. The mass spectra of the series of dienes I-IV and monoenes VI-X are discussed.