(+/-)-3-oxovincadifformine ethyl ester 14 has been synthesized through an intramolecular [4 pi+2 pi] cycloaddition of the 3-oxosecodine 13 first prepared in turn from the enamide 10 by dehydrogenation with benzeneseleninic anhydride. An insight into the conversion of 10 into 13 was gained, resulting in the suggestion of a plausible mechanistic pathway.
(±)-3-氧代
春雷霉素乙酯(14)是通过3-氧代二氢
吲哚(13)的分子内[4π+2π]环加成反应合成的,而3-氧代二氢
吲哚(13)则是依次从烯酰胺(10)经由苯
硒酸酐脱氢制备得到。研究了10到13的转化过程,从而提出了一个合理的机理 pathways。