Asymmetric 1,4-Addition of Arylboronic Acids to α,β-Unsaturated<i>N</i>-Acylamides Catalyzed by Dicationic Palladium(II)–(<i>S</i>,<i>S</i>)-Chiraphos Complex
作者:Takashi Nishikata、Yasunori Yamamoto、Norio Miyaura
DOI:10.1246/cl.2007.1442
日期:2007.12.5
Palladium-catalyzed 1,4-addition of arylboronic acids to unsaturated carbonyl compounds has been limitedly used for ketone and aldehyde derivatives. It was found that reaction with N-acylamides exceptionally proceeds with high yields and high enantioselectivities. A dicationic palladium–chiraphos catalyst 3 gave optically active β-arylamides of up to 98% ee.
钯催化的芳基硼酸与不饱和羰基化合物的 1,4-加成已被有限地用于酮和醛衍生物。研究发现,与 N-酰基酰胺的反应特别能以高产率和高对映选择性进行。使用二盐基钯-铁石棉催化剂 3 生成的光学活性 β-芳基酰胺的ee高达 98%。