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First Total Synthesis of Enantiomerically Pure(−)-Silphiperfol-6-en-5-on

✍ Scribed by Martin Demuth; Werner Hinsken

Publisher
John Wiley and Sons
Year
1988
Tongue
German
Weight
579 KB
Volume
71
Category
Article
ISSN
0018-019X

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✦ Synopsis

7,

Both enantiomers 1 are accessible in high yields and purities ( >. 97% ex.) via asymmetric prolin-catalyzed Robinson annulation of 2-methylcyclopentane-1,3-dione with methyl vinyl ketone [9]. Yields refer to chromatographically purified compounds. For the photochemical 1,3-acyl shift ofp,y-enones, see 1131.

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