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Synthesis 2010(20): 3453-3460
DOI: 10.1055/s-0030-1258215
DOI: 10.1055/s-0030-1258215
PAPER
© Georg Thieme Verlag
Stuttgart ˙ New YorkStereoselective Approaches to the Total Synthesis of (6R,4′S,6′R)-Cryptofolione
Further Information
Received
4 June 2010
Publication Date:
17 August 2010 (online)
Publication History
Publication Date:
17 August 2010 (online)

Abstract
Total syntheses of cryptofolione were accomplished by two different routes via a common intermediate that underwent a cross-metathesis (CM) reaction with a vinyl lactone. The intermediate was prepared by coupling of an acyl anion equivalent with a chiral allyl epoxide synthon, or by Prins cyclization of a trans-cinnamaldehyde with a chiral homoallylic alcohol. Goniothalamin was obtained as a cross-metathesis product of the diacetate and vinyl lactone.
Key words
lactones - total synthesis - heterocycles - cyclizations - cryptofolione
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References
Diacetate 20 was prepared from the diol 17 by acetylation (Scheme [6] ).

Scheme 6