作者:Aaron W. Amick、Atsushi Wakamiya、Lawrence T. Scott
DOI:10.1021/jo800379x
日期:2008.7.1
heterocycles (thiepines), some of which extrude sulfur and give the ring-contracted hydrocarbon even at room temperature in solution, benzannulated thiopyrans (6-membered sulfur heterocycles) require flash vacuum pyrolysis (FVP) conditions in the gas phase at temperatures in the range of 1000−1200 °C to promote the corresponding reaction. Thus, FVP of benzo[kl]thioxanthene (1) gives fluoranthene, and naphtho[2
与完全不饱和的7元环硫杂环(硫平)相反,其中一些硫即使在室温下也能在溶液中挤出并产生环缩合的烃,而苯并环噻喃(6元硫杂环)则需要快速真空热解(FVP)在气相中在1000-1200°C的温度范围内进行反应,以促进相应的反应。因此,苯并[ kl ]噻吨(1)的FVP产生荧蒽,而萘并[2,1,8,7- klmn ]噻吨(6)产生苯并[ ghi ]荧蒽(7)。噻吨酮(9)的FVP生成芴酮(10),以及较少量的二苯并[ b,d噻吩(11),来自竞争性脱羰基。