Hybrid super electron donors - preparation and reactivity.

Hybrid super electron donors - preparation and reactivity.
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DOI:
10.3762/bjoc.8.112
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发表时间:
2012
影响因子:
2.7
通讯作者:
Murphy JA
Murphy JA
中科院分区:
化学4区
文献类型:
--
作者:
Garnier J;Thomson DW;Zhou S;Jolly PI;Berlouis LE;Murphy JA

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报道了以亚吡啶基-亚咪唑基、亚吡啶基-亚苯并咪唑基和亚咪唑基-亚苯并咪唑基为特征的中性有机电子给体。吡啶亚基-苯并咪唑亚基和咪唑亚基-苯并咪唑亚基杂化体系被设计成第一个在室温下将碘代芳烃转化为芳基的超电子供体,并且实际上两者都显示出在室温下显著芳基形成的证据。较强的亚吡啶基-亚咪唑基供体在适当条件下有效地将碘代芳烃转化为芳基阴离子(3当量的供体)。过量氢化钠碱的存在下,这些电子转移反应中的一些具有非常重要的和选择性的影响,并提出了一个理由。
Neutral organic electron donors, featuring pyridinylidene–imidazolylidene, pyridinylidene–benzimidazolylidene and imidazolylidene–benzimidazolylidene linkages are reported. The pyridinylidene–benzimidazolylidene and imidazolylidene–benzimidazolylidene hybrid systems were designed to be the first super electron donors to convert iodoarenes to aryl radicals at room temperature, and indeed both show evidence for significant aryl radical formation at room temperature. The stronger pyridinylidene–imidazolylidene donor converts iodoarenes to aryl anions efficiently under appropriate conditions (3 equiv of donor). The presence of excess sodium hydride base has a very important and selective effect on some of these electron-transfer reactions, and a rationale for this is proposed.
DOI: 10.1055/s-2008-1078242
发表时间: 2008-08-22
期刊: SYNLETT
影响因子: 2
作者:
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发表时间: 1999-03-26
期刊: TETRAHEDRON
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