Gold-Catalyzed Cascade Oxidative Cyclization and Arylation of Allenoates
作者:Rui Zhang、Qin Xu、Kai Chen、Peng Gu、Min Shi
DOI:10.1002/ejoc.201300896
日期:2013.11
was found to be effective for the cascadeoxidativearylation and cyclization of allenoates with arylboronic acids to give the corresponding cyclic adducts in moderate yields. This reaction system constitutes a new method for the synthesis of β-aryl-γ-butenolides under mild conditions. Based on the previous mechanistic studies, a proposed AuI/AuIII redox catalytic cycle has been outlined.
Catalytic Cross-Coupling of Vinyl Golds with Diazonium Salts under Photoredox and Thermal Conditions
作者:Dilip V. Patil、Hokeun Yun、Senghoon Shin
DOI:10.1002/adsc.201500525
日期:2015.8.24
Catalytically generated vinyl gold complexes from tert‐butyl allenoates were found to undergo an efficient cross‐coupling with arenediazonium salts. The gold(I)‐gold(III) redox cycle can be accessed under two different conditions, i.e., visible‐light photoredox as well as a thermally induced radical chain pathway. The current C(sp2)C(sp2) cross‐coupling protocol that is catalytic in gold, would make available