Pyrazolyl–benzoxazole derivatives as protein kinase inhibitors. Design and validation of a combinatorial library
作者:Daniela Berta、Marzia Villa、Anna Vulpetti、Eduard R. Felder
DOI:10.1016/j.tet.2005.08.070
日期:2005.11
describe the design and synthesis of a kinase targeted library based on a novel 2-(3-phenyl-1H-pyrazol-4-yl)-1,3-benzoxazole scaffold. Ethyl 3-(3-nitrophenyl)pyrazole-4-carboxylate and its 4-nitro regioisomer were bound to trityl chloride resin, saponified with NaOH in MeOH, and amidated with a choice of two o-aminophenols. The resulting N-(2-hydroxyphenyl)amides were cyclized by Mitsunobu reaction to form
蛋白激酶的功能异常是许多疾病的标志,对于这些疾病,缺少令人满意的治疗方法。我们描述了基于新型的2-(3-苯基-1 H-吡唑-4-基)-1,3-苯并恶唑支架的激酶靶向库的设计和合成。将3-(3-硝基苯基)吡唑-4-羧酸乙酯及其4-硝基区域异构体与三苯甲基氯树脂结合,用NaOH的MeOH溶液皂化,并用两种邻氨基苯酚选择酰胺化。结果N-(2-羟苯基)酰胺通过Mitsunobu反应环化,形成吡唑基-苯并恶唑核心模板的四个变体。固相上硝基的氯化亚锡直接还原后,可通过酰化或磺酰化获得的氨基官能团进行随后的支架衍生化。用TFA切割产生最终化合物(36个实施例)。