Rearrangement reactions of aromadendrane derivatives. The synthesis of (+)-maaliol, starting from natural (+)-aromadendrene-IV
摘要:
Starting from the hydroazulene alpha-ketol 6, which can easily be prepared from (+)-aromadendrene (1), two different routes to hydronaphthalene compounds with a maaliane skeleton have been developed, both proceeding in high overall yield. The first route leads to cis-fused maaliane derivatives; the second one offers access to trans-fused maaliane sesquiterpenes, as demonstrated in this paper in the synthesis of (+)-maaliol (5).