Short-step Synthesis of Large Cycloparaphenylenes
Short-step Synthesis of Large Cycloparaphenylenes
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DOI：
10.1246/cl.180486
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发表时间：
2018-09-01
影响因子：
1.6
通讯作者：
Yamago, Shigeru
中科院分区：
文献类型：
--
作者：
Kayahara, Eiichi;Cheng, Yao;Yamago, Shigeru
[5 n]-和[7 m]-环对苯撑（CPPs）的无规合成（n = 2-A，m = 2-3）和[1,4]CPP的选择性合成分别通过镍或铂介导的含顺式-1，4-双环的五环和七环单元的环化反应完成（三乙基甲硅烷氧基）-2，5-环己二烯-1，4-二基和H2SnCl 4介导的三乙基甲硅烷基保护的环己二烯基的芳构化。[20]-[21]首次合成了CPPs。
The random synthesis of [5n]- and [7m]cycloparaphenylenes (CPPs) (n = 2-A and m = 2-3) and the selective synthesis of [14]CPP were achieved in four and six steps, respectively, by the nickel- or platinum-mediated cyclizations of the penta- and hepta-ring units containing cis-1,4-bis(triethylsiloxy)-2,5-cyclohexadiene-l,4-diyl and the H2SnCl4-mediated aromatization of the triethylsilyl-protected cyclohexadienediol. [20]- and [21]CPPs were synthesized for the first time.