Tetrahedron Letters p. 8839 - 8842 (1994)
Update date:2022-07-29
Topics:
Costa, Maria do Ceu
Tavares, Regina
Motherwell, William B.
Curto, Maria Joao Marcelo
New processes have been developed which allow the stereoselective syntheses of the ambergris ketals 8α,13;13,17-diepoxi-14,15-dinorlabdane 1 and 8β,13;13,17-diepoxi-14,15-dinorlabdane 2, through selection of the appropriate catalyst for the δ,ε-epoxycarbonyl rearrangement of the key intermediate 3, which is, in turn, obtained by controlled oxidation of anticopalic acid 6.
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