我们公开了一种预干燥形式的甲基亚氨基二乙酸 (MIDA),即 MIDA 酸酐,既可以作为 MIDA 配体的来源,也可以作为原位干燥剂,以实现温和且简单的 MIDA 硼酸酯合成程序。这种方法扩大了可转化为 MIDA 硼酸盐对应物的敏感硼酸的范围。进一步利用 MIDA 硼酸盐的独特特性,我们开发了 MIDA 硼酸盐 Maker 试剂盒,该套件能够仅使用加热和离心设备从硼酸中直接制备和纯化 MIDA 硼酸盐,这些设备在不专门从事有机合成的实验室中广泛使用。
Development of the Direct Suzuki–Miyaura Cross-Coupling of Primary <i>B</i>-Alkyl MIDA-boronates and Aryl Bromides
作者:Jeffrey D. St. Denis、Conor C. G. Scully、C. Frank Lee、Andrei K. Yudin
DOI:10.1021/ol500057a
日期:2014.3.7
The development of a palladium-catalyzed sp3–sp2 Suzuki–Miyaura cross-coupling of B-alkyl-N-methyliminodiacetyl (B-alkyl MIDA) boronates and (hetero)aryl bromides is reported. This transformation is tolerant of a variety of functional groups (F, NO2, CN, Cl, COCH3, and CHO). B-Alkyl MIDA boronates allow an efficientcross-coupling reaction directed toward the synthesis of unsymmetrical methylene diaryls
Synthesis, Structure and Reactivities of Pentacoordinated Phosphorus–Boron Bonded Compounds
作者:Nathan J. O'Brien、Naokazu Kano、Nizam Havare、Ryohei Uematsu、Romain Ramozzi、Keiji Morokuma
DOI:10.1002/ejic.202000229
日期:2020.5.29
bicyclic compound or it could act as a mono‐hydroboration reagent. The hydroboration reactivity of the intermediate was found to be higher towards alkynes vs. alkenes, with good to moderate regioselectivity towards the terminal carbon. The second compound, a phosphoranyl‐triarylborate, was found to have different reactivity as it was highly stable towards acids and bases. This is thought to be due