Abstract

As an alternative to the electrochemical procedure [Shono (1984). Tetrahedron, 40, 811-850], N-acyliminium-ion precursors may be generated utilizing novel hypervalent iodine chemistry. The crystal structures of 2-azido-N,N-diphenylpyrrolidine-1-carboxamide, C 17 H 17 N 5 O, and 2,5-diazido-N-(3,4,5-trimethoxybenzoyl)pyrrolidine, C 14 H 17 N 7 O 4 , are reported. In both instances the pyrrolidine ring is found in the half-chair conformation. The azido groups are non-linear with an average bond angle of 172.9 (1)°

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