Palladium/Norbornene Cooperative Catalysis To Access Tetrahydronaphthalenes and Indanes with a Quaternary Center
作者:Ze-Shui Liu、Guangyin Qian、Qianwen Gao、Peng Wang、Hong-Gang Cheng、Qiang Wei、Qi Liu、Qianghui Zhou
DOI:10.1021/acscatal.8b00975
日期:2018.6.1
palladium/XPhos complex and 5-norbornene-2-carboxylic acid was developed. This system promotes a two-component annulation reaction, allowing the construction of tetrahydronaphthalenes and indanes that contain quaternary centers through consecutive Catellani-type C–H activation and redox-relay Heck reaction. Inexpensive 5-norbornene-2-carboxylic acid acts as a catalytic mediator (20 mol %) in this process. This mild
开发了包含钯/ XPhos配合物和5-降冰片烯-2-羧酸的协同催化体系。该系统促进了两组分环化反应,从而通过连续的Catellani型C–H活化和氧化还原中继Heck反应,构建了含有四级中心的四氢萘和茚满。廉价的5-降冰片烯-2-羧酸在该方法中充当催化介体(20mol%)。这种温和的,可扩展的和化学选择性的方案与各种现成的芳基碘化物和烷基化试剂兼容。证明了该方法在阿片类镇痛肽唑嗪的4步合成中的应用。初步研究强调了将这种Catellani /氧化还原中继Heck级联反应对映选择性的未来前景。