Stereocontrolled synthesis of the key intermediate for the enantioselective synthesis of clerodane natural products
摘要:
Stereocontrolled synthesis of (+)-trans-decalone 7 (R = CH=CH2) from (-)-verbenone (5), readily obtainable from (+)-nopinone (2), is described. The compound 7 possesses four correctly arranged chiral centers, C(5)-C(10)-C(9)-C(8), necessary for the enantioselective synthesis of neo-trans-clerodanes. (C) 1997 Elsevier Science Ltd.
Stereocontrolled synthesis of the key intermediate for the enantioselective synthesis of clerodane natural products
摘要:
Stereocontrolled synthesis of (+)-trans-decalone 7 (R = CH=CH2) from (-)-verbenone (5), readily obtainable from (+)-nopinone (2), is described. The compound 7 possesses four correctly arranged chiral centers, C(5)-C(10)-C(9)-C(8), necessary for the enantioselective synthesis of neo-trans-clerodanes. (C) 1997 Elsevier Science Ltd.
three kinds of key intermediates, conjugate enones 9 and 10 for the syntheses of neo-trans-clerodanes and 11 for those of neo-cis-clerodanes. Starting with the compound 10, the first enantioselective syntheses of (−)-(5R,8S,9S,10R)-7-oxo-cleroda-3,13E-dien-15-oic acid (7-oxo-kolavenic acid) (1) and solidagonic acid (2) as its methyl ester (48) were achieved.