The invention is directed to methods of converting a carboxylic acid group in a compound, via a redox active ester, to a corresponding boronic ester by treatment with bis(pinacolato)diboron-alkyllithium complex in the presence of a ligand, a Ni(ll) salt or a copper salt, and an Mg(ll) salt, in the presence of an alkyllithium or a lithium hydroxide or alkoxide salt. The product pinacolato boronate ester can be cleaved to provide a boronic acid. The invention is also directed to methods of preparing various compounds of medical value comprising boronic acid groups, and to novel boronic-acid containing compounds of medicinal value, including an atorvastatin boronic acid analog, a vancomycin aglycone boronic acid analog, and boronic acid containing elastase inhibitors mCBK319, mCBK320, mCBK323, and RPX-7009.
这项发明涉及通过使用双(邻
菲罗)二
硼烷基
锂络合物在
配体、Ni(Ⅱ)盐或
铜盐以及Mg(Ⅱ)盐的存在下,处理化合物中的
羧酸基,通过氧化还原活性酯将其转化为相应的
硼酯酯。在存在烷基
锂或
氢氧化锂或烷氧化
锂盐的情况下,所述产品邻
菲罗
硼酸酯酯可以被裂解以提供
硼酸。该发明还涉及制备含
硼酸基的医用价值化合物的方法,以及具有药用价值的新型含
硼酸基化合物,包括
阿托伐他汀硼酸类似物、
万古霉素裸核
硼酸类似物和含
硼酸的弹性蛋白酶抑制剂mCBK319、mCBK320、mCBK323和RPX-7009。