“…Ethyl lupininate (Va) was prepared by treatment of ethyl 1-10-dehydrolupininate (IVb),7 obtained from the reaction of IVa (3.0 g, 13 mmol) with ethyl chloroformate (1.4 g, 11 mmol), with sodium borohydride (2.5 g, 66 mmol) in methanol (15 ml) at 5°. The pure desire ester7 was obtained by distillation: yield 0.75 g (57%); bp 79-81°(0.025 mm); nmr (CCh) 4.05 (q, 2, OCH2), 3.0-1.2 (complex, 16, quinolizidine H), and 1.13 (t, 3, CCHg).…”