基于与 3,6-咔唑基间隔基相连的脲嘧啶嘧啶酮的氢键环状四聚体。
Hydrogen-bonded cyclic tetramers based on ureidopyrimidinones attached to a 3,6-carbazolyl spacer.
机构信息
Institute of Chemical Research of Catalonia (ICIQ), 43007-Tarragona, Spain.
出版信息
Org Lett. 2011 Jun 17;13(12):3186-9. doi: 10.1021/ol200946b. Epub 2011 May 24.
PMID:21608985
Abstract
Direct attachment of two 2-ureido-4-[1H]-pyrimidinone (UPy) subunits to a 3,6-carbazolyl core gives rise to a highly viscous, supramolecular polymer. However, insertion of a methylene spacer between the UPy's and the carbazole leads to a well-defined, cyclic tetramer, in a belt-shaped arrangement, as evidenced by MALDI-TOF, DOSY, and NOESY spectra.
摘要
直接将两个 2-脲基-4-[1H]-嘧啶酮（UPy）亚基连接到 3,6-咔唑核心上，会产生一种高度粘稠的超分子聚合物。然而，在 UPy 和咔唑之间插入一个亚甲基间隔物会导致形成一个定义明确的、环状四聚体，呈带状排列，这一点可以通过 MALDI-TOF、DOSY 和 NOESY 光谱得到证明。
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