Abstract

Aspidophytine is one component of the insecticidal dimeric indole alkaloid haplophy­tine and was first obtained along with canthiphy­tine by an acid-mediated degradation of haplophytine. This concise total synthesis is built on three key reactions: (1) a triflic anhydride-mediated Vilsmeier-Haack reaction, (2) a radical cyclization (J → K), and (3) an oxidative lactonization of K.

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