G-四链体是由富含鸟嘌呤的核酸序列形成的异常结构。已经假定G-四链体在许多生物系统中起重要作用,包括基因调控和酶功能抑制。最近,我们的实验室报道了合成并评价具有良好亲和性和选择性的G-四链体的Triaza-cyclopentaphenanthrene化合物的合成和评价。该化合物含有一个4-吡啶酮基团,该基团以前没有用于其他四链体结合剂中。在这封信中,我们描述了含有2-和3-羧基-苯并喹啉作为G-四链体结合剂的4-吡啶酮的合成和评价。我们发现这些化合物能够与K a在3×10 5范围内的G-四链体结合。 M -1且对四链体的选择性是双链体DNA的10倍。
G-四链体是由富含鸟嘌呤的核酸序列形成的异常结构。已经假定G-四链体在许多生物系统中起重要作用,包括基因调控和酶功能抑制。最近,我们的实验室报道了合成并评价具有良好亲和性和选择性的G-四链体的Triaza-cyclopentaphenanthrene化合物的合成和评价。该化合物含有一个4-吡啶酮基团,该基团以前没有用于其他四链体结合剂中。在这封信中,我们描述了含有2-和3-羧基-苯并喹啉作为G-四链体结合剂的4-吡啶酮的合成和评价。我们发现这些化合物能够与K a在3×10 5范围内的G-四链体结合。 M -1且对四链体的选择性是双链体DNA的10倍。
l-Proline-catalyzed synthesis of highly functionalized multisubstituted 1,4-dihydropyridines
作者:Huanfeng Jiang、Ronghuan Mai、Hua Cao、Qiuhua Zhu、Xiaohang Liu
DOI:10.1039/b914659h
日期:——
Highlyfunctionalized multisubstituted 1,4-dihydropyridines 5 have been concisely synthesized in moderate to good yields viaL-proline-catalyzed one-pot multicomponentreactions (MCRs) of alkynoates or alkynones 1, amines 2, β-dicarbonyl compounds 3 and aldehydes 4 under mild conditions. The MCR process involves hydroamination/Knoevenagel condensation/Michael-type addition/intramolecular cyclization
Solvent-Free Mechanosynthesis of Polysubstituted 1,2-Dihydroquinolines from Anilines and Alkyne Esters
作者:Hui Xu、Guan-Wu Wang
DOI:10.1021/acs.joc.2c00605
日期:2022.7.1
A novel one-pot reaction of anilines with acetylenedicarboxylate diesters in the presence of boron trifluoride, iodine, and trifluoroacetic acid or methylsulfonic acid has been developed under solvent-free ball-milling conditions, affording a variety of polysubstituted 1,2-dihydroquinolines bearing multiple ester groups in moderate to excellent yields. The present protocol features mild reaction conditions