Azo compounds belong to the 'classic' organic molecules with a long and impressive history in organic chemistry of by far more than a century. 1 Applications are of wide industrial importance, for example, in the field of dyes. However, this is true in particular for aromatic azo compounds, whereas the synthesis of non-aromatic azo compounds is less known and still challenging. Most surprisingly, in spite of the long history of azo compounds there is a ...