Oxidative Photocatalytic Homo- and Cross-Coupling of Phenols: Nonenzymatic, Catalytic Method for Coupling Tyrosine
作者:Kyle A. Niederer、Philip H. Gilmartin、Marisa C. Kozlowski
DOI:10.1021/acscatal.0c04515
日期:2020.12.18
An oxidative photocatalytic method for phenol–phenol homo- and cross-coupling is described, and isolated yields of 16–97% are obtained. Measured oxidation potentials and computed nucleophilicity parameters support a mechanism of nucleophilic attack of one partner onto the oxidized neutral radical form of the other partner. Our understanding of this model permitted the development of cross-coupling reactions
作者:Jeffery A. Gladding、James P. Bacci、Scott A. Shaw、Amos B. Smith
DOI:10.1016/j.tet.2011.04.094
日期:2011.9
Studies directed toward the synthesis of the architecturally complex marine natural product sporolide B are described. Synthetic analysis suggested advanced hydroquinone and benzodiquinane fragments, which upon elaboration were successfully united via an ester linkage. Macrocyclization studies were then carried out, and although a novel macrocyclization product was obtained, subsequent studies revealed
描述了针对结构复杂的海洋天然产物孢子内酯 B 合成的研究。合成分析表明,先进的氢醌和苯二喹烷碎片在精心设计后通过酯键成功结合。然后进行了大环化研究,虽然获得了一种新的大环化产品,但随后的研究表明,C(6) 和 C(10) 处的叔羟基在空间上受阻,无法参与成功的大环化以提供孢子内酯 B。