作者:Austin D. Marchese、Louise Kersting、Mark Lautens
DOI:10.1021/acs.orglett.9b02797
日期:2019.9.6
A scalable, diastereoselective nickel-catalyzed carboiodination reaction is reported that avoids metal-based reducing agents. Novel anti-dihydroquinolones and previously unreported tetrahydroquinolines are now readily prepared. The generation of anti-dihydroquinolones is noteworthy, as this selectivity is opposite to that of the Pd variant. Mechanistic insight into the nature of the nickel-catalyzed
Two different cyclic amino esters are synthesized by palladium-catalyzed cross-coupling reaction of diazoesters with N-substituted-2-iodoanilines. Aryldiazoacetates lead to cyclic α-amino esters with an α-quaternary carbon centre in the presence of CO. Additionally, arylvinyldiazoacetates afford cyclic α,β-unsaturated γ-amino esters.
carbonylation reaction for the synthesis of N‐acetyl benzoxazinones has been achieved for the first time. To avoid the using of toxic and flammable CO gas, formic acid was utilized as the CO source here. This carbonylative process is conducted under mild reaction conditions with high reaction efficiency. A variety of the desired N‐acetyl benzoxazinone products were obtained in moderate to excellent yields