Metal-free thermal organocatalytic pinacol coupling of arylaldehydes using an isonicotinate catalyst with bis(pinacolato)diboron
作者:Masamichi Yasui、Kengo Hanaya、Takeshi Sugai、Shuhei Higashibayashi
DOI:10.1039/d1ra04443e
日期:——
The metal-free thermal organocatalytic pinacol coupling of arylaldehydes has been developed. The intermolecular coupling of arylaldehydes catalyzed by t-butyl isonicotinate with bis(pinacolato)diboron as the co-reducing agent afforded 1,2-diphenylethane-1,2-diols. This reaction was also applicable to the intramolecular coupling of 1,1′-biphenyl-2,2′-dicarbaldehydes to afford 9,10-dihydrophenanthrene-9
已经开发了芳醛的无金属热有机催化频哪醇偶联。由异烟酸叔丁酯催化的芳醛与双(频哪醇)二硼作为共还原剂的分子间偶联得到1,2-二苯基乙烷-1,2-二醇。该反应也适用于 1,1'-联苯-2,2'-二甲醛的分子内偶联得到 9,10-二氢菲-9,10-二醇。在这种偶联条件下可以耐受各种官能团。