作为Lamellarin D类似物的chromeno [3,4- b ]吲哚的合成:一种新型DYRK1A抑制剂
摘要:
开发了取代的chromeno [3,4- b ]吲哚文库作为lamellarin等位基因。在涉及C的四步路径序列之后,由吲哚完成合成-3碘化,Suzuki交叉偶联反应和一锅脱保护/内酯化步骤。测试了二十种最终化合物以确定它们对拓扑异构酶I和激酶(Lamellarins的两种主要生物学活性)的活性。一种新合成的衍生物显示出强大的拓扑异构酶活性,可与参比化合物(例如喜树碱和lamellarin)相比,但激酶抑制作用较弱。其他两种先导化合物被鉴定为新的纳摩尔DYRK1A抑制剂,其他几种药物影响亚微摩尔范围内的激酶。这些结果将使我们能够使用chromeno [3,4- b ]吲哚作为药效团来开发有效治疗涉及DYRK1A的神经系统或肿瘤性疾病的方法。
Light-induced one-pot synthesis of pyrimidine derivatives from vinyl azides
作者:Tuan K. Nguyen、Gleb D. Titov、Olesya V. Khoroshilova、Mikhail A. Kinzhalov、Nikolai V. Rostovskii
DOI:10.1039/d0ob00693a
日期:——
A one-pot procedure for the synthesis of tetrasubstituted dihydropyrimidine and pyrimidine derivatives from α-azidocinnamates was developed. The synthesis is based on the finding that the outcome of LED photolysis of α-azidocinnamates depends on the light wavelength employed. Blue light (455 nm) leads to the formation of 2H-azirines only, but violet light (395 nm), UV-A light (365 nm), or sunlight
开发了一种一锅法,可从α-叠氮基壬二酸酯合成四取代的二氢嘧啶和嘧啶衍生物。该合成基于以下发现:α-叠氮二胍的LED光解结果取决于所采用的光波长。蓝光(455 nm)仅导致2 H-叠氮基的形成,而紫光(395 nm),UV-A光(365 nm)或日光导致原位形成的2 H-叠氮基转化为1,3-二氮杂双环[3.1.0]己-3-烯。在碱性催化(DBU)下,后者被异构化为1,6-二氢嘧啶,然后使用DDQ将其氧化为嘧啶。还证明了Cs 2 CO 3作为碱和空气作为氧化剂的成功使用。
Asymmetric transfer hydrogenation of α-azido acrylates
作者:Yang Ji、Ping Xue、Dan-Dan Ma、Xue-Qiang Li、Peiming Gu、Rui Li
DOI:10.1016/j.tetlet.2014.11.072
日期:2015.1
The asymmetric transfer hydrogenation of alpha-azido acrylates has been explored, a range of alpha-hydroxy esters are produced with good enantioselectivities (80-90% ee). The reaction was conducted in the wet HCO2H/NEt3 with Ru-TsDPEN A. (C) 2014 Elsevier Ltd. All rights reserved.