On. Burchak et al., Terpenic methyl ketones derived from limonene, (+)-3-carene, and alpha-pinene in Fischer's indole synthesis., HETEROCYC C, 6(1), 2000, pp. 73-80
Methyl ketones derived from monoterpene hydrocarbons limonene, a-pinene, an
d (+)-3-carene are converted into a new terpendoles in Fischer's indole syn
thesis. Regioselectivity of indole formation depend on the structural featu
res of starting ketones but not on the reaction conditions.