Xf. Wang et al., TOTAL SYNTHESIS OF (+ -)-NIMBONONE, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 37(9), 1998, pp. 929-932
A first expeditious total synthesis of (+/-)-Nimbonone 10, a novel nat
urally occurring diterpenoid isolated from the Neem tree, is described
. In order to induce the ethyl substituent, Friedel-Crafts acetylation
and then decarbonylation have been employed as the key steps.