Synthesis, Structures and Conformational Studies of 1,2-Dimethyl[2.10]metacyclophan-1-enes
Synthesis, Structures and Conformational Studies of 1,2-Dimethyl[2.10]metacyclophan-1-enes
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1,2-二甲基[2.10]间环芳-1-烯的合成、结构和构象研究
DOI:
10.1002/slct.201600670
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发表时间:
2016
期刊:
影响因子:
2.1
通讯作者:
Akther T
中科院分区:
文献类型:
--
作者:
Akther T
A series of 1,2‐dimethyl[2.10]metacyclophan‐1‐enes (MCP‐1‐enes) containing different substituent groups has been synthesized to illustrate their conformational behavior. 4,22‐dimethoxy‐1,2‐dimethyl[2.10]MCP‐1‐ene3was synthesized by a Grignard coupling reaction, Friedel‐Crafts acylation reactions and McMurry coupling reaction from 1,10‐dibromodecane. The formation of 4,22‐dihydroxy‐1,2‐dimethyl[2.10]MCP‐1‐ene4was carried out by demethylation of compound3with boron tribromide at room temperature. Thesyntype conformation of4was characterized by X‐ray diffraction and was found to form both intramolecular and intermolecular hydrogen bonds between the two hydroxyl groups. From this reaction an interesting compound [10]tetrahydrobenzofuranophane5was afforded on prolonging the reaction time. 5,21‐diformyl‐4,22‐dihydroxy‐1,2‐dimethyl[2.10]MCP‐1‐ene6has been prepared from 4,22‐dihydroxy‐1,2‐dimethyl[2.10]MCP‐1‐ene4by using the Duff method in the presence of hexamethylenetetramine. Structural analysis by1H NMR spectroscopy and X‐ray diffraction confirmed that both the solution and the crystalline state of compound6adopts ananti‐conformation which forms an intramolecular hydrogen bond between the formyl group and the hydroxyl group, which is an interesting finding for long carbon chain MCP compounds.
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DOI:
--
发表时间:
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期刊:
J. Chem. Research
影响因子:
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作者:
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DOI:
10.1021/jo802579f
发表时间:
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期刊:
The Journal of organic chemistry
影响因子:
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影响因子:
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