Silicon Spiro Double Helicene-like Compounds Based on Dithieno[2,3-b:3鈥?2鈥?d]thiophene: Syntheses and Crystal Structures

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• 作者：Chunli Li ; Longlong Wu ; Wan Xu ; Jinsheng Song ; Jianwu Shi ; Panpan Yu ; Yuhe Kan ; Hua Wang
• 刊名：Journal of Organic Chemistry
• 出版年：2015
• 出版时间：November 6, 2015
• 年：2015
• 卷：80
• 期：21
• 页码：11156-11161
• 全文大小：417K
• ISSN：1520-6904

文摘

Silicon spiro carbon鈥搒ulfur double helicene-like compounds 1 and rac-2 were synthesized from 2,5-bis-trimethylsilanyldithieno[2,3-b:3鈥?2鈥?d]thiophene, with total yields of 17% and 7%, respectively. ¹H and ¹³C NMR spectra and X-ray crystallographic analysis showed the predicted 4-fold symmetry for 1 and rac-2 and confirmed their spiro double helicene-like spatial configurations. The absorption behavior of compounds 1 and rac-2 was also investigated.