Preparation and Suzuki−Miyaura Coupling Reactions of Tetrahydropyridine-2-boronic Acid Pinacol Esters
作者:Ernesto G. Occhiato、Fabrizio Lo Galbo、Antonio Guarna
DOI:10.1021/jo050995+
日期:2005.9.1
6-tetrahydropyridine-2-boronic acid pinacol ester derivatives by Pd-catalyzed coupling reaction with both bis(pinacolato)diboron and pinacolborane, pyrrolidinone and ε-caprolactam derivatives either did not react or were readily reduced. The δ-valerolactam-derived vinyl boronates are thermally stable compounds that efficiently coupled, under Pd catalysis, with structurally diverse aryl and heteroaryl bromides
进行了将内酰胺衍生的乙烯基三氟甲磺酸酯和磷酸盐转化为相应的硼酸乙烯基酯的研究。δ-戊内酰胺衍生的乙烯基三氟甲磺酸酯可通过Pd与双(频哪醇)二硼烷和频哪醇硼烷,吡咯烷酮和ε-己内酰胺偶合的Pd催化成功地转化为1,4,5,6-四氢吡啶-2-硼酸频哪醇酯衍生物衍生物不反应或容易还原。衍生自δ-戊内酰胺的硼酸乙烯基酯是热稳定的化合物,在Pd催化下可与结构多样的芳基和杂芳基溴化物和三氟甲磺酸酯,乙烯基碘化物和溴化物以及芳族酰氯有效偶联,从而形成相应的2-取代哌啶达到优异的产量。