of α,β;γ,δ-unsaturated diazo-compounds the type (6) with a cis hydrogen atom at the terminal carbon atom undergo 1,7 ring closure to give 3H-1,2-diazepines while those (9) with a methyl group at that position take an alternative reaction path to give pyrazoles via 1,5 cyclisation.
在α,β的热环化中; γ,δ-不饱和重氮化合物在末端碳原子上带有顺式氢原子的化合物(6)进行1,7闭环生成3 H -1,2-二氮杂pine,而在那些(9)具有甲基的二氮杂ze采取另一种反应路线,通过1,5环化反应生成
吡唑。