Benzyloxycalix[8]arene supported Pd–NHC cinnamyl complexes for Buchwald–Hartwig C–N cross-couplings
作者:Sandra Abi Fayssal、Timothée Naret、Vincent Huc、Julien Buendia、Cyril Martini、Emmanuelle Schulz
DOI:10.1039/d1cy00669j
日期:——
and in one case, promoted the synthesis of an unprecedented Pd-catalyzed C–H activation product. Thanks to the calixarenic support, the target products could be isolated with low levels of residual palladium, and in some cases, even below the restrictive toxic metal standards applied by the pharmaceutical industry. Through an easy to implement procedure, these perfectly characterised catalysts thus
报道了在苄氧基杯[8]芳烃上负载的 Pd-NHC 肉桂基配合物的可扩展合成。这些催化剂对 Buchwald-Hartwig 交叉偶联反应非常活跃,允许使用低催化负载将芳基氯和芳基溴与各种烷基和芳基胺偶联。负载的配合物还成功地提供了有吸引力的不对称三芳基胺,并且在一种情况下,促进了前所未有的 Pd 催化的 C-H 活化产物的合成。由于杯芳烃支持,目标产品可以分离出低水平的残留钯,在某些情况下,甚至低于制药行业应用的限制性有毒金属标准。通过一个易于实施的程序,