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- W2129289596 abstract "Pyrrolizin-3-ones (e.g.1) can be easily hydrogenated to their hexahydro (pyrrolizidin-3-one) derivatives in the presence of heterogeneous catalysts. Good diastereoselectivity (up to >97:3, depending on catalysts and solvent) can be achieved if the pyrrolizin-3-one is substituted at the 1- (or 7-) position(s), but the selectivity is reduced if both positions are substituted. Subsequent deoxygenation of the pyrrolizidin-3-ones provides concise, diastereoselective routes to the necine bases (±)-heliotridane 5, (±)-isoretronecanol 6 and (±)retronecanol 7." @default.
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- W2129289596 date "2009-01-01" @default.
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- W2129289596 title "Hydrogenation of pyrrolizin-3-ones; new routes to pyrrolizidines" @default.
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- W2129289596 doi "https://doi.org/10.1039/b910199c" @default.
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