A general synthetic route for 1-substituted 4-oxygenated β-carbolines (synthetic studies on indoles and related compounds 41)

Article abstract of DOI:10.1016/S0040-4020(96)01112-X

A new synthetic route for two naturally occurring 1-substituted 4-methoxy-β-carbolines (1b, c) is described. This synthetic route involves elaboration of the ester groups in ethyl indole-2-carboxylate (4b) and its 1-benzyl derivative (4a), C₃-s