Iridium-Catalyzed Hydroalkylation of Aliphatic Alkenes with β-Ketoesters: Formal Hydroalkylation with Methyl Ketones
作者:Takahiro Sawano、Kei Ogihara、Jun Sagawa、Masaki Ono、Ryo Takeuchi
DOI:10.1021/acs.orglett.0c02291
日期:2020.8.7
highly atom-economical manner. We found that hydroalkylation of aliphatic alkenes with β-ketoesters proceeded with the use of a cationic iridium complex and bidentate phosphine ligand to give selectively branched α-substituted β-ketoesters in high yields. The obtained hydroalkylated compounds can be converted to β-substituted ketones through one-pot Krapcho dealkoxycarbonylation.
过渡金属催化的烯烃与1,3-二羰基化合物的加氢烷基化是在中性反应条件下以高度原子经济的方式构建CC键的有用反应。我们发现,使用阳离子铱络合物和二齿膦配体进行脂肪族烯烃与β-酮酸酯的加氢烷基化反应,可以高产率地产生选择性支链的α-取代的β-酮酸酯。可以通过一锅Krapcho脱烷氧羰基化将获得的加氢烷基化的化合物转化为β-取代的酮。