Oxidative Cycloaddition of Thiophenophanes – [n](2.5)Parathiophenophane (n = 8,10-12,14), [8](2,4)Metathiophenophane and [2.2](2,5)Parametathiophenophane
作者:YuanQiang Li、Thies Thiemann、Keisuke Mimura、Tsuyoshi Sawada、Shuntaro Mataka、Masashi Tashiro
DOI:10.1002/(sici)1099-0690(199809)1998:9<1841::aid-ejoc1841>3.0.co;2-p
日期:1998.9
The oxidative cycloaddition of 3,4-dibromo-[n](2,5)thiophenophanes 12b–e and (2,4)[8]thiophenophane 16 with dienophiles gave stereoselectively OS-bridged cycloadducts 18, 19 and 24. The X-ray analysis of cycloadduct 18a shows it to have a rigid conformation. The molecules can be regarded as a new series of paddlanes. Under the same oxidative conditions, 3,4-dibromo-[8](2,5)thiophenophane (12a) gave
3,4-二溴-[n](2,5)噻吩12b-e和(2,4)[8]噻吩16与亲二烯体的氧化环加成反应得到立体选择性OS桥接环加合物18、19和24。X-环加合物 18a 的射线分析表明它具有刚性构象。这些分子可以看作是一系列新的桨叶。在相同的氧化条件下,3,4-二溴-[8](2,5)噻吩 (12a) 得到两个二聚体 29 和 30。讨论了 29 的 X 射线分析结果。