Origin of Increased Reactivity in Rhenium-Mediated Cycloadditions of Tetrazines.

Origin of Increased Reactivity in Rhenium-Mediated Cycloadditions of Tetrazines.
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DOI:
10.1021/acs.joc.1c01564
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发表时间:
2021-09-17
期刊:
The Journal of organic chemistry
影响因子:
--
通讯作者:
Svatunek D
Svatunek D
中科院分区:
其他
文献类型:
--
作者:
Turlik A;Houk KN;Svatunek D

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配位到金属(如吡啶)上的吡啶基四嗪在[4 + 2]环加成反应中比它们未配位的对应物更具反应性。使用密度泛函理论计算,我们发现了一个更有利的相互作用能所造成的更强的轨道相互作用的起源,这种增加的反应性。此外,高区域选择性是由于在过渡态中更大程度的电荷稳定性,导致主要产物。
Pyridyl tetrazines coordinated to metals like rhenium have been shown to be more reactive in [4 + 2] cycloadditions than their uncomplexed counterparts. Using density functional theory calculations, we found a more favorable interaction energy caused by stronger orbital interactions as the origin of this increased reactivity. Additionally, the high regioselectivity is due to a greater degree of charge stabilization in the transition state, leading to the major product.
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