Über eine Synthese des angulären Di(cyclobuteno)benzols

On a Synthesis of the angular Di(cyclobuteno)benzol In the course of our studies aimed at better understanding the Mills‐Nixon effect, we have also prepared the angular di(cyclobuteno)benzene (1), the synthesis of which has been recently described by another group [3]. Our completely different and essentially simpler synthetic approach will be pointed out. A special pyrolysis apparatus is designed.