Getting excited about cycloadditions
Getting excited about cycloadditions
复制标题
对环加成感到兴奋
DOI：
10.1126/science.abg7834
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发表时间：
2021
期刊：
影响因子：
56.9
通讯作者：
Schmidt, Valerie A.
中科院分区：
文献类型：
--
作者：
Schmidt, Valerie A.
合成化学家使用光化学来实现具有挑战性或不寻常的化学转化，但并非所有化合物都具有光活性。光敏化是指不能有效吸收特定波长的光的分子通过光敏剂分子间的三重态能量传递而提升到其三重态激发态（T1）的过程。光敏剂是一种理想的具有大消光系数、快速的系统间交叉速率和长T1寿命的化合物。光敏化的一个特别优点是，不能通过基态获得的独特的反应性曲线，从相应的激发态变得容易(1)。光敏剂在化学合成中的应用与各种光氧化还原催化剂的普及和使用是同步的(2)。在本期的第1338页，Maet等人(3)报道了一种光敏脱芳香[4 + 2]环加成，利用可见光将简单的不饱和构建块转化为增加分子复杂性的产物。
Synthetic chemists use photochemistry to achieve challenging or unusual chemical transformations, but not all compounds are photoactive. Photosensitization is a process by which a molecule that is incapable of efficiently absorbing a particular wavelength of light directly is promoted to its triplet excited state (T1) by an intermolecular triplet energy transfer from a photosensitizer, which is a compound that ideally has a large extinction coefficient, rapid rate of intersystem crossing, and a long-lived T1. A particular advantage of photosensitization is that distinctive reactivity profiles not accessible through ground states become facile from corresponding excited states (1). The use of photosensitizers in chemical synthesis has paralleled the rise in popularity and use of various photoredox catalysts (2). On page 1338 of this issue, Maet al.(3) report a photosensitized dearomative [4 + 2] cycloaddition that converts simple, unsaturated building blocks into products of increased molecular complexity using visible light.
影响因子：
15
作者：
Elliott, Luke D.;Kayal, Surajit;Booker-Milburn, Kevin
通讯作者：
Booker-Milburn, Kevin