Synthesis of (+/-)-secosyrin 1 and a formal synthesis of (-)-secosyrin 1.

Donohoe TJ, Fisher JW, Edwards PJ

[reaction: see text] A short synthesis of (+/-)-secosyrin 1 is presented that starts from an electron-deficient furan; reductive alkylation under Birch conditions gives rapid access to the natural product skeleton. Two aspects of stereoselectivity are explored, the first being directed dihydroxylation of a homoallylic alcohol. Second, the facial selectivity obtained during reduction of a highly substituted cyclic ketone was examined. Finally, our synthesis was rendered enantioselective by the reduction of a furan bearing a chiral auxiliary.

Keywords:

Catalysis

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Furans

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Indicators and Reagents

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Molecular Structure

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Oxidation-Reduction

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Pseudomonas syringae

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Spiro Compounds

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Stereoisomerism