作者:Tue Heesgaard Jepsen、Mogens Larsen、Morten Jørgensen、Mogens Brøndsted Nielsen
DOI:10.1016/j.tetlet.2011.05.125
日期:2011.8
Two new scalable methods for the synthesis of dibenzo[bc,fg]dithiapentalene (2) (DPP) are reported starting from either 1-bromo-3-fluoro-2-iodobenzene over four steps in 57% yield or from THP-protected 3-fluorothiophenol over three steps in 43% yield. Attempts to prepare dibenzodioxapentalene (15) using similar conditions were unsuccessful. Instead, we observed the formation of a macrocyclic dimeric
据报道,从1-溴-3-氟-2-碘苯的四个步骤以57%的产率或从THP保护的3开始,有两种新的可扩展的合成二苯并[ bc,fg ]二硫杂戊烯(2)(DPP)的方法。分三步反应得到-氟代苯硫酚,收率为43%。在相似条件下尝试制备二苯并二恶戊五烯(15)的尝试均未成功。相反,我们观察到了大环二聚体产物16的形成。通过NMR在F / SH和F / OH取代的二苯并噻吩和二苯并呋喃中间体中观察到氟-氢键相互作用。