Sulfur-Rich Heterocycles from 2-Metalated Benzo[<i>b</i>]thiophene and Benzo[<i>b</i>]furan: Synthesis and Structure
作者:Tomasz Janosik、Birgitta Stensland、Jan Bergman
DOI:10.1021/jo0257086
日期:2002.8.1
The reaction of 2-lithiated benzo[b]thiophene with 8 equiv of elemental sulfur was found to give pentathiepino[6,7-b]benzo[d]thiophene. In contrast, treatment of 2-lithiated benzo[b]furan with sulfur under similar conditions produced the interesting ring system bis(benzo[4,5]furo)[2,3-e:3',2'-g][1,2,3,4]tetrathiocine. Both of these new cyclic polysulfides were studied by X-ray crystallography. Two
发现2-锂化的苯并[b]噻吩与8当量的元素硫的反应产生了五硫庚并[6,7-b]苯并[d]噻吩。相反,在相似的条件下用硫处理2-锂化的苯并[b]呋喃会产生有趣的环系统双(苯并[4,5]呋喃)[2,3-e:3',2'-g] [1 ,, 2,3,4]四硫精。通过X射线晶体学研究了这两种新的环状多硫化物。发现了五种噻吩并[6,7-b]苯并[d]噻吩的多晶型物,显示出相似的构型但不同的填充方案,这从粉末衍射数据中也可以看出。