Preparation and Application of Solid, Salt-Stabilized Zinc Amide Enolates with Enhanced Air and Moisture Stability
作者:Yi-Hung Chen、Mario Ellwart、Georgios Toupalas、Yusuke Ebe、Paul Knochel
DOI:10.1002/anie.201700216
日期:2017.4.10
various N‐morpholino amides with TMPZnCl⋅LiCl (TMP=2,2,6,6‐tetramethylpiperidyl) and Mg(OPiv)2 in THF at 25 °C provides solid zinc enolates with enhanced air and moisture stability (t1/2 in air: 1–3 h) after solvent evaporation. These enolates undergo Pd‐ and Cu‐catalyzed cross‐couplings with (hetero)aryl bromides as well as allylic and benzylic halides. The arylated N‐morpholino amides were converted into
在25°C下用TMPZnCl⋅LiCl(TMP = 2,2,6,6-四甲基哌啶基)和Mg(OPiv)2在THF中处理各种N-吗啉代酰胺可提供具有增强的空气和湿气稳定性的固体烯醇锌(t 1溶剂蒸发后,在空气中/ 2(1-3小时)。这些烯醇化物与(杂)芳基溴化物以及烯丙基和苄基卤化物经历钯和铜催化的交叉偶联。所述芳基化的N-吗啉代酰胺通过的LaCl转化成各种酮3 ⋅2的LiCl介导的酰基化以格氏试剂。新的固体烯醇化物被用来分六个步骤制备有效的抗乳腺癌药物候选物,总产率为23%。