Efficient Synthesis of Bulky 2,2’‐Bipyridine and (
<i>S</i>
)‐Pyridine‐Oxazoline Ligands
作者:Zhipeng Zheng、Patrick J. Walsh
DOI:10.1002/adsc.202001218
日期:2021.2.2
N’‐bidentate ligands can furnish catalysts with enhanced catalytic activity compared to commercially available ligands. Straightforward methods to effectively synthesize a broad range of these ligands, however, are uncommon. In this work, a simple and efficient method is developed for the synthesis of bulky N,N’‐bidentate ligands, including 2,2’‐bipyridines and enantioenriched pyridine‐oxazolines. The
与市售的配体相比,大体积的N,N '双齿配体可以提供具有增强的催化活性的催化剂。然而,直接合成有效范围广泛的这些配体的简单方法并不常见。在这项工作中,开发了一种简单有效的方法来合成庞大的N,N'-双齿配体,包括2,2'-联吡啶和对映体富集的吡啶-恶唑啉。Pd / NIXANTPHOS催化剂体系能够合成一系列庞大的2,2'-联吡啶基配体和(S)-吡啶恶唑啉基对映体富集的配体,收率良好或极好。配体已经在苯乙烯的氨基氟化中作了基准。