from the corresponding cycloalkenyl bromides. The key step is a retro-ene reaction under FVT conditions. The purple-blue thioketones 1 and 2, polymerizing rapidly above −80°C in the condensed phase, have been characterized by UV-visible and IR spectroscopy at −196°C, as well as, in the gas phase, by direct FVT/HRMS coupling. The reaction of 2 with diazomethane in THF led to 1,3-dithiolane 9.
所述反应性未取代的环己-2- enethione(1)和环戊-2- enethione(2)已经在两个步骤(产率合成了CA从相应的环烯基
溴化物70%)。关键步骤是在FVT条件下进行逆烯反应。紫色-蓝色
硫代酮1和2在-80°C以上的冷凝相中迅速聚合,其特征在于-196°C时具有UV-可见光谱和IR光谱,以及在气相中通过直接FVT / HRMS耦合。2与
重氮甲烷在THF中的反应生成1,3-二
硫杂
环戊烷9。