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Durch Li‐alanat‐Reduktion des Lupanin‐N‐oxids (I) wird ein ein neues Spartein‐N‐1 6‐ oxid (II) [im 1:1‐Gemisch mit Spartein (III)] gewonnen; Na‐boranat‐Reduktion von (I) führt zu einem 85:15‐Gemisch von (II) mit einem (III)/Lupanin (IV)‐Gemisch.

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C.d. data have been recorded for seventeen compounds of the sparteine series related to 11 P-sparteine (a-isosparteine) and 1 1 a-sparteine. The chromophores involved are the tertiary amine and NN-dialkyl-lactarn systems ; the compounds studied include eight amines, eight amino-lactams, and one dilactam.THE sparteine alkaloids are of considerable interest for chiroptical studies because they contain chromophores of two different types (NN-dialkyl-lactam and tertiary amine) in a rather rigid system of four fused sixmembered rings (1). The skeleton may be considered l Preceding papcr in the Westfield series, hitherto entitled '