Copper-catalyzed boroacylation of allenes to access tetrasubstituted vinylboronates
作者:Bing-Xue Shen、Xiang-Ting Min、Yan-Cheng Hu、Lei-Lei Qian、Sa-Na Yang、Boshun Wan、Qing-An Chen
DOI:10.1039/d0ob02008g
日期:——
A distinct copper-catalyzed boroacylation of allenes with acyl chlorides and bis(pinacolato)diboron is developed. For aromatic acyl chlorides, 1,2-boroacylation of allenes readily takes place, leading to the formation of tetrasubstituted vinylboronates with exclusive (E)-stereoselectivity. In comparison, the employment of alkyl acyl chlorides as electrophiles alters the selectivity to 2,3-boroacylated
开发了一种独特的铜催化丙二烯与酰氯和双(频哪醇)二硼的硼酰化反应。对于芳族酰氯,丙二烯很容易发生 1,2-硼酰化,导致形成具有排他性 ( E )-立体选择性的四取代乙烯基硼酸酯。相比之下,使用烷基酰氯作为亲电试剂会改变对 2,3-硼酰化产物的选择性。此外,该产品可以很容易地进行 Suzuki-Miyaura 交叉偶联,得到完全保留构型的四取代烯烃。