BF3·OEt2-Promoted Synthesis of 2,3-Metallocenocyclohexanones: A 1,2-Hydride Shift and Cationic Cyclization Strategy.

BF3·OEt2-Promoted Synthesis of 2,3-Metallocenocyclohexanones: A 1,2-Hydride Shift and Cationic Cyclization Strategy.
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BF3·OEt2 促进 2,3-茂金属环己酮的合成:1,2-氢化物转移和阳离子环化策略。

DOI:
10.1021/acs.joc.5b01511
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发表时间:
2015
期刊:
The Journal of organic chemistry
影响因子:
--
通讯作者:
Z. Gu
Z. Gu
中科院分区:
--
文献类型:
--
作者:
Congfa He;Jie Wang;Z. Gu

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报道了BF_3·OEt_2促进的环己烯基烯酮环化反应。仅生成2,3-茂金属环己酮,未检测到正常Nazarov型环戊酮类似物。该反应可能是通过一个不寻常的阳离子1,2-氢化物位移,然后Friedel-Crafts烷基化环化过程进行的。在这些酮酯的烷基化反应的研究中,观察到一个不寻常的和罕见的面选择性。亲电体将从与第二Cp环相同的面受到攻击。
A BF3·OEt2-promoted cyclization of metallocenyl enones to form cyclohexanone-fused metallocenes is reported. 2,3-Metallocenocyclohexanones were formed exclusively, and no normal Nazarov-type cyclopentanone analogues were detected. The reaction possibly proceeded via an unusual cationic 1,2-hydride shift followed by Friedel-Crafts alkylative cyclization process. During the studies of the alkylation reaction of these keto esters, an unusual and rare facial selectivity was observed. The electrophiles would be attacked from the same face as the second Cp ring.
DOI: 10.1021/ja103028r
发表时间: 2010-06-23
影响因子: 15
作者:
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发表时间: 2011-08-17
影响因子: 15
作者:
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