Pyridine sulfinates as general nucleophilic coupling partners in palladium-catalyzed cross-coupling reactions with aryl halides
作者:Tim Markovic、Benjamin N. Rocke、David C. Blakemore、Vincent Mascitti、Michael C. Willis
DOI:10.1039/c7sc00675f
日期:——
Pyridine rings are ubiquitous in drug molecules; however, the pre-eminent reaction used to form carbon–carbon bonds in the pharmaceutical industry, the Suzuki–Miyaura cross-coupling reaction, often fails when applied to these structures. This phenomenon is most pronounced in 2-substituted pyridines, and results from the difficulty in preparing, the poor stability of, and low efficiency in reactions
吡啶环在药物分子中无处不在;但是,在制药工业中用于形成碳-碳键的杰出反应,铃木-宫浦交叉偶联反应,在应用于这些结构时通常会失败。这种现象在2-取代的吡啶中最明显,并且是由于2-吡啶硼酸酯的制备困难,稳定性差和反应效率低所致。我们证明通过用吡啶-2-亚磺酸盐代替这些硼酸盐,实现了无与伦比的范围和实用性的交叉偶联过程。相应的3-和4-取代的吡啶变体也是有效的偶联伴侣。此外,我们将这些亚磺酸盐以文库格式应用于制备伐尼克兰(Chantix)和美吡拉明(Anthisan)的医学相关衍生物。