Rhodium-Catalyzed Annulation of Primary Benzylamine with α-Diazo Ketone toward Isoquinoline
作者:Haoke Chu、Peiran Xue、Jin-Tao Yu、Jiang Cheng
DOI:10.1021/acs.joc.6b01378
日期:2016.9.2
Rhodium-catalyzed annulation of commercially available primarybenzylamine with α-diazo ketone was developed, leading to isoquinolines in moderate to good yields. This procedure features the employment of primarybenzylamine as starting material as well as high selectivity in the 3- and 4- position of isoquinoline, generating a key compliment to the previously developed annulation with internal alkyne
Asymmetric hydrogenation of isoquinolines with chiral cationic ruthenium diamine catalysts
作者:Zi-Qi Yi、Fei Chen、Yan-Mei He、Qing-Hua Fan
DOI:10.1016/j.tet.2023.133736
日期:2023.12
general asymmetrichydrogenation of isoquinolines catalyzed by chiral cationic ruthenium catalysts has been investigated. A wide range of isoquinoline derivatives, including 1-substituted, 3-substituted, 1,3-disubstituted and 3,4-disubstituted isoquinolines, were efficiently hydrogenated to give chiral tetrahydroisoquinolines with up to 92 % ee and >20:1 dr. It was found that the ruthenium catalyst bearing
研究了手性阳离子钌催化剂催化的异喹啉的一般不对称氢化。多种异喹啉衍生物,包括 1-取代、3-取代、1,3-二取代和 3,4-二取代异喹啉,可有效氢化得到手性四氢异喹啉,其 ee 高达 92%,dr 大于 20:1。研究发现,带有非配位BArF阴离子的钌催化剂具有高对映选择性。初步机理研究表明,异喹啉通过逐步途径还原,包括1,2-氢化物加成、异构化和2,3-氢化物加成。
Enantioselective Iridium-Catalyzed Hydrogenation of 3,4-Disubstituted Isoquinolines