β‐Fur‐2‐yl‐α‐halogenacrylonitrile. V [1] Darstellung von β‐(5‐Nitro‐fur‐2‐yl)‐α‐azidoacrylonitril und β‐(5‐Nitro‐fur‐2‐yl)‐α‐aminoacrylonitril

β‐Fur‐2‐yl‐α‐halogenacrylonitriles. V. Preparation of β‐(5‐Nitro‐fur‐2‐yl)‐α‐azidoacrylonitrile and β‐(5‐Nitro‐fur‐2‐yl)‐α‐aminoacrylonitrileβ‐(5‐Nitro‐fur‐2‐yl)‐α‐chloroacrylonitrile (1) reacts with sodium azide to yield β‐(5‐nitro‐fur‐2‐yl)‐α‐azidoacrylonitrile (2). By Staudinger‐reaction β‐(5‐nitro‐fur‐2‐yl)‐α‐aminoacrylonitrile (5) is formed. The 1H‐ and 13C‐n.m.r. spectra of E/Z isomers are discussed.