Oxidative Biaryl Coupling of Thiophenes and Thiazoles with Arylboronic Acids through Palladium Catalysis: Otherwise Difficult C4-Selective CH Arylation Enabled by Boronic Acids
作者:Sylvia Kirchberg、Satoshi Tani、Kirika Ueda、Junichiro Yamaguchi、Armido Studer、Kenichiro Itami
DOI:10.1002/anie.201007060
日期:2011.3.1
It adds up to 4! Thiophenes and thiazoles can be arylated in the 4‐ rather than the expected 5‐position in a new CH functionalization reaction (see scheme; TEMPO: 2,2,6,6‐tetramethylpiperidine‐N‐oxyl). The boronic acid proved to be the key to achieving the otherwise difficult C4 selectivity. The method was applied to a concise synthesis of a key pharmacological structure with potential for treatment
总计为4!噻吩和噻唑可以在新的CH官能化反应中的4位而不是预期的5位芳基化(请参阅方案; TEMPO:2,2,6,6-四甲基哌啶-N-氧基)。硼酸被证明是实现否则很难的C4选择性的关键。该方法被用于关键药理结构的简明合成,具有治疗阿尔茨海默氏病的潜力。