Hjm. Gijsen et al., REARRANGEMENT REACTIONS OF AROMADENDRANE DERIVATIVES - THE SYNTHESIS OF (-MAALIOL, STARTING FROM NATURAL (+)-AROMADENDRENE-IV()), Tetrahedron, 50(16), 1994, pp. 4733-4744
Starting from the hydroazulene alpha-ketol 6, which can easily be prep
ared from (+)-aromadendrene (1), two different routes to hydronaphthal
ene compounds with a maaliane skeleton have been developed, both proce
eding in high overall yield. The first route leads to cis-fused maalia
ne derivatives; the second one offers access to trans-fused maaliane s
esquiterpenes, as demonstrated in this paper in the synthesis of (+)-m
aaliol (5).