Synthesis of (−)-Gleenol via C-H Insertion Reaction of Alkylidenecarbene
A spiro sesquiterpene alcohol, (−)-gleenol (1) was synthesized from (−)-l-menthol in 16 steps, using the C-H insertion reaction of the alkylidenecarbene as the key step. The absolute configuration of (−)-1 was determined to be 1S, 6R, 7S, 10R.