Anthranilamide (aam)-substituted arylboranes in direct carbon–carbon bond-forming reactions
作者:Shintaro Kamio、Ikuo Kageyuki、Itaru Osaka、Hiroto Yoshida
DOI:10.1039/c8cc10252j
日期:——
Anthranilamide (aam)-substituted arylboranes, which were reported to serve as masked boranes in the Suzuki–Miyaura coupling, have been found to be directly cross-coupled just by use of an aqueous medium. The excellent stability of 2-pyridyl-B(aam) toward protodeborylation allowed their smooth cross-coupling.
Suzuki reaction of aryl bromides and arylboronicacids is developed. The cross-coupling reactions can be performed at room temperature using 5.0 equiv. of Et3N as solvent and base without any ligands, and affording biaryl products in good yields. In addition, the chemoselecitive Suzuki reaction of bromo-N-methyliminodiacetic acid (MIDA) boronates with arylboronicacids can be achieved in this system, and
Suzuki–Miyaura reaction protocol of using bromophenyl fluorosulfonate as building block for the preparation of unsymmetrical terphenyls. The chemoselective cross-coupling of bromophenyl fluorosulfonate and arylboronicacids can be achieved by controlling base species without using any ligands. Under this methodology, various of m- and p-unsymmetrical terphenyls were obtained in moderate to good yields.
Suzuki–Miyaura Cross-Coupling of 1,8-Diaminonaphthalene (dan)-Protected Arylboronic Acids
作者:Yuichiro Mutoh、Kensuke Yamamoto、Shinichi Saito
DOI:10.1021/acscatal.9b03667
日期:2020.1.3
Suzuki–Miyaura cross-coupling reaction of 1,8-diaminonaphthalene (dan)-protected arylboronicacids in the presence of KOt-Bu, which does not require the removal of the dan moiety. Notably, the use of aryl-B(dan) in the Suzuki–Miyaura reaction provides a complementary solution to the protodeboronation problems. The base KOt-Bu plays a crucial role for the promotion of these cross-coupling reactions as
我们报道了在存在KO t -Bu的情况下1,8-二氨基萘(dan)保护的芳基硼酸的Suzuki-Miyaura交叉偶联反应,该反应不需要去除dan部分。值得注意的是,在Suzuki-Miyaura反应中使用芳基-B(dan)可为原脱硼问题提供补充解决方案。碱KO t -Bu在促进这些交叉偶联反应中起着至关重要的作用,因为它能够形成硼酸盐。该反应方案扩展到了4-[((pin)B] C 6 H 4 -B(dan)的一锅顺序Suzuki-Miyaura交叉偶联反应,其中“反应性较低”的芳基-B(dan)部分优先交叉耦合。