Abstract

Thermolysis of activated N-cyanoalkyl amines (5) provides access to acyclic azomethine ylides (6). The allenic N-cyanoalkyl amine (10a) undergoes Ag(I)-catalysed cyclisation followed by thermally-induced loss of HCN from (11a) to provide the heterocyclic ylide (12) which has been trapped by N-methyl maleimide.

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