Copper‐Catalyzed Monoorganylation of Trialkyl Borates with Functionalized Organozinc Pivalates
作者:Ying Fu、Bei‐Lei Gou、Chun‐Zhao Shi、Zhengyin Du、Tong Shen
DOI:10.1002/cctc.201800939
日期:2018.10.9
Organozinc pivalates, a recently developed air‐ and moisture‐stable organozinc species, were found for the first time as excellent organometallic species in the monoorganylation of trialkyl borates whereby boronic acids were prepared in high yields. The significant advantage of organozinc pivalates over another previously employed organometallic reagents, e. g., organolithium reagents, Grignard reagents
新出现的有机锌新戊酸酯是一种对空气和水分稳定的有机锌物种,在硼酸三烷基酯的单有机基化中首次被发现是极好的有机金属物种,从而可以高产率制备硼酸。有机锌新戊酸酯相对于另一种先前使用的有机金属试剂的显着优势。例如,有机锂试剂,格氏试剂和卤化有机锌是完全抑制了多有机基化副产物如硼酸和三烷基硼烷的产生。此外,原位生成的硼酸盐可直接安排到Suzuki-Miyaura型交叉偶联反应中,从而以高收率生产联芳基。