An Improved Protocol for the Pd-Catalyzed α-Arylation of Aldehydes with Aryl Halides
作者:Rubén Martín、Stephen L. Buchwald
DOI:10.1021/ol8017775
日期:2008.10.16
An improved protocol for the Pd-catalyzed alpha-arylation of aldehydes with arylhalides has been developed. The new catalytic system allows for the coupling of an array of substrates including challenging electron-rich aryl bromides and less reactive aryl chlorides. The utility of this method has been demonstrated in a new total synthesis of (+/-)-sporochnol.
N-dimethylformamide dimethyl acetal (DMF-DMA) for the selective cleavage of ethers via neighboring group participation. Various acid-labile functional groups, including carboxylate, allyl, tert-butyldimethylsilyl (TBS), and tert-butoxycarbonyl (Boc), suffer the conditions intact. The method offers an efficient approach to cleaving catechol monoalkyl ethers and to uncovering phenols from acetal-type protecting
High-Throughput Screening Protocol for the Coupling Reactions of Aryl Halides Using a Colorimetric Chemosensor for Halide Ions
作者:Min Sik Eom、Jieun Noh、Han-Sung Kim、Soyeon Yoo、Min Su Han、Sunwoo Lee
DOI:10.1021/acs.orglett.6b00300
日期:2016.4.15
efficiency as a tool for high-throughputscreening (HTS) of transition-metal-catalyzed coupling reactions was investigated. It showed a high selectivity for halide ions. When the PAR–2Hg2+ complex was used in the Suzuki coupling reaction and C–H activated coupling reaction with aryl bromides, the quantitative and qualitative conversions of aryl halides were obtained from the reaction mixture color change