Reactions of Unsaturated Azides; Part 27: Synthesis of 1,4-Diazidobuta-1,3-dienes

In Scheme 1, two extra H atoms appeared on the general structure for bi-2H-azirin-2-yls 2. The correct scheme is shown here.

Scheme 1 The only known synthesis of 1,4-diazidobuta-1,3-dienes and some of their reactions