Templating and Catalyzing [2+2] Photocycloaddition in Solution Using a Dynamic G‐Quadruplex
Templating and Catalyzing [2+2] Photocycloaddition in Solution Using a Dynamic G‐Quadruplex
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模板化和催化 [2 2] 使用动态 G-Quadruplex 在溶液中进行光环加成
DOI:
10.1002/anie.201811202
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Davis, Jeffery T.
中科院分区:
文献类型:
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作者:
Sutyak, Keith B.;Lee, Wes;Zavalij, Peter V.;Gutierrez, Osvaldo;Davis, Jeffery T.
We describe a templating/covalent capture strategy that enables photochemical formation of 8 cyclobutanes in one noncovalent assembly. This process was characterized by experiment and quantum mechanical/molecular mechanics (ONIOM) calculations. Thus, KI and 16 units of 5′‐cinnamate guanosine form a G‐quadruplex where C=C π bonds in neighboring G4‐quartets are separated by 3.3 Å, enabling [2+2] photocycloaddition in solution. This reaction is high‐yielding (>90 %), regio‐ and diastereoselective. Since all components are in dynamic equilibrium this photocycloaddition is catalytic in K+.