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A new synthetic route for the (±)-nordasycarpidone was achieved in five steps with an overall yield of 41%. This route involves ring closure and formation of 5 which has a methanoazocino[4,3-b]indole skeleton in the key step. The reaction also involved a cyclization reaction of tetrahydrocarbazole with a monoalkyl nitrile side chain at the C-2 position, and this reaction was mediated by tetrachloro-1,4-benzoquinone (TCB). The central step in the synthesis was the closure of the D-ring of thedoi:10.20450/mjcce.2020.1736 fatcat:cm5fibmazzhetldac6draauetu