Pigments of Fungi, 65! Synthesis of Haematopodin – a Pigment from the Mushroom Mycena haematopus (Basidiomycetes)

Haematopodin (1), a pigment from fruit bodies of the mushroom Mycena haematopus, was synthesized from 6,7‐bis‐(benzyloxy)indole (5). Key steps in the synthesis were the addition of 3‐[(2,4‐dimethoxybenzyl)amino]‐1‐propanol (11) to the indolo‐6,7‐quinone 10 and cyclization of the resulting adduct 12 with trifluoroacetic acid.