使用螺氨基酸 N-羧酸酐 (NCA) 合成了与咪唑并苯二氮卓 MIDD0301 结构相关的新型 γ-氨基丁酸受体 (GABA A R) 配体。这些化合物表现出对 2 相代谢的抵抗力增强,并避免了 6H 异构体的形成。化合物设计以分子对接为指导,使用 α 1 β 3 γ 2 GABA A R 的可用晶体结构,并与体外结合数据相关。含有GABA A R配体的羧酸具有高水溶性、低渗透性和低细胞毒性。 GABA A R 配体无法穿过血脑屏障,这在体内通过不存在感觉运动抑制而得到证实。肺 GABA A R 的药理活性通过离体豚鼠气道平滑肌松弛和清醒小鼠乙酰甲胆碱诱导的气道高反应性 (AHR) 的减少得到证实。我们鉴定出支气管扩张剂5c对 GABA A R 的亲和力为 9 nM,在人类和小鼠微粒体存在下代谢稳定。
Synthesis of Sterically Hindered N-Acylated Amino Acids from N-Carboxyanhydrides
摘要:
Sterically hindered N-acyl, gem-disubstituted amino acids are easily prepared via the addition of organometallic reagents to N-carboxyanhydrides (NCA). The process tolerates a wide variety of functional groups and allows the synthesis of amide products not readily accessible by traditional acylation chemistry. The existence of an isocyanate intermediate was established by in situ IR spectroscopy.
An Atom-Economical Method To Prepare Enantiopure Benzodiazepines with <i>N</i>-Carboxyanhydrides
作者:Patrick S. Fier、Aaron M. Whittaker
DOI:10.1021/acs.orglett.7b00417
日期:2017.3.17
development of a rapid, one-potsynthesis of diazepinones with simple reagents is described. N-Carboxyanhydrides (NCAs) are employed as amino acid building blocks that react with o-ketoanilines sequentially as electrophiles and nucleophiles to form diazepinones with water and carbon dioxide as byproducts. Notably, these reactions enable the coupling of stereodefined amino acid derived NCAs without racemization