Acid-promoted iron-catalysed dehydrogenative [4 + 2] cycloaddition for the synthesis of quinolines under air
作者:Jinfei Yang、Xiao Meng、Kai Lu、Zhihao Lu、Minliang Huang、Chengniu Wang、Fei Sun
DOI:10.1039/c8ra06826g
日期:——
An acid-promoted iron-catalysed dehydrogenative [4 + 2] cycloaddition reaction was developed for the synthesis of quinolines using air as a terminal oxidant. Acetic acid was the best cocatalyst for the cycloaddition of N-alkyl anilines with alkenes or alkynes under air. Various quinoline derivatives were obtained in satisfactory-to-excellent yields, and no other byproducts besides water were produced
开发了一种酸促进的铁催化脱氢 [4 + 2] 环加成反应,用于以空气为末端氧化剂合成喹啉。乙酸是N-烷基苯胺与烯烃或炔烃在空气中环加成的最佳助催化剂。各种喹啉衍生物均以令人满意至优异的收率得到,且反应中除水外未产生其他副产物。斑马鱼模型已成为评价药物作用的重要脊椎动物模型。我们测试了斑马鱼中3n的活性。试验结果表明,1 μg mL -1 3n处理导致形态畸形,0.01~0.1 μg mL -1 3n治疗导致斑马鱼胚胎中出现严重的血管生成缺陷。该研究成果对推进心脑血管疾病药物研究具有重要意义。
Manganese(<scp>ii</scp>)-catalysed dehydrogenative annulation involving C–C bond formation: highly regioselective synthesis of quinolines
作者:Chengniu Wang、Jinfei Yang、Xiao Meng、Yufeng Sun、Xuyan Man、Jinxia Li、Fei Sun
DOI:10.1039/c9dt00647h
日期:——
An inexpensive nontoxic manganese(ii)-catalysed dehydrogenative annulation was developed for C–C bond formation.
Indium(III) Trifluoromethanesulfonate: An Efficient Reusable Catalyst for the Alkynylation-Cyclization of 2-Aminoaryl Ketones and Synthesis of 2,4-Disubstituted Quinolines
作者:Dipak Prajapati、Kushal Lekhok、Ramesh Boruah
DOI:10.1055/s-2008-1042800
日期:——
An environmentally friendly and highly efficient procedure for the preparation of 2,4-disubstituted quinoline derivatives has been developed by a simple alkynylation-cyclization reaction of 2-aminoaryl ketones with phenylacetylenes in the presence of indium(III) trifluoromethanesulfonate In(OTf)3 under microwave irradiation and solvent-free conditions. This catalyst can be recovered after the reaction and reused efficiently in subsequent runs.