Synthesis of Vinca Alkaloids and Related Compounds, XIII1) Syntheses Starting from 2‐(Ethoxycarbonyl)tryptamine

Abstract
The Pictet‐Spengler reaction of 2‐(ethoxycarbonyl)tryptamine (1) with aldehyde esters 2 and 3 leads to unexpected products (4a and 9a/10a, resp.). The structures of the new compounds were elucidated by spectroscopic and chemical means.

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