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Asymmetric Synthesis of (-)-Tetrahydrolipstatin

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1991

Year

Abstract

The asymmetric synthesis of the β-propiolactone functionality of tetrahydrolipstatin was achieved via a stereoselective aldol reaction between the iron octanoyl complex (S)-[(η5-C5H5)Fe(CO)(PPh3)COC7H15] and (S)-3-benzyloxytetradecanal (obtained via a Noyori asymmetric hydrogenation of methyl 3-oxotetradecanoate) followed by oxidative decomplexation. Subsequent debenzylation and introduction of the N-formylleucine residue gave (-)-tetrahydrolipstatin.