Synthesis of 1,2,3,4‐Tetrahydroisoquinolines via Palladium‐Catalyzed Cyclization of
<i>N</i>
‐Tosylhydrazones with
<i>ortho</i>
‐Bromophenethyl Tosylamides
作者:Jieming Zhang、Zhan‐Ming Zhang、Qi Wu、Junliang Zhang
DOI:10.1002/adsc.202200931
日期:2022.12.8
A Pd-catalyzed synthesis of 1,2,3,4-tetrahydroisoquinoline (THIQ) via cyclization of ortho-bromophenethyl tosylamides with aryl N-tosylhydrazones in the presence of base was developed. The reaction is believed to proceed via the oxidative addition of palladium with ortho-bromophenethyl tosylamides, followed by carbene insertion and cyclization. The carbene species were generated in-situ from the aryl
开发了一种 Pd 催化合成 1,2,3,4-四氢异喹啉 (THIQ),方法是在碱存在下邻溴苯乙基甲苯磺酰胺与芳基N-甲苯磺酰腙环化。据信该反应是通过钯与邻-溴苯乙基甲苯磺酰胺的氧化加成反应进行的,然后是卡宾插入和环化。卡宾物种由芳基N-甲苯磺酰腙和 KO t Bu 原位生成。