Photocyclisation of haloacetyl tryptophan derivatives

Abstract
Irradiation of dichioroacetyl tryptophan methyl ester gives, after addition of a nucleophile in work-up, the 7-substituted pyrrolobenzazocines (7); similar cyclisation of the tryptophan derivative (11) gives the pyrrolobenzazocine (12), a compound related to serotobenine.

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