Novel and convenient synthesis of polyfunctionalized quinolines, quinolones and their annulation reactions
作者:Mei-Xiang Wang、Yong Liu、Zhi-Tang Huang
DOI:10.1016/s0040-4039(01)00231-3
日期:2001.3
The reaction of α-aroylketene dithioacetals with esters of o-aminobenzoic acid under different conditions afforded preferentially 2-methylthio-3-aroylquinolones and 2-anilino-3-aroylquinolines through, respectively, α-aroylketene N,S-acetal and α-aroylketene aminal intermediates. The annulationreaction of 2-methylthio-3-aroylquinolones with hydrazine gave both pyrazolo[3,4-b]quinolone and pyrazolo[4
α-芳基烯酮二硫缩醛与邻氨基苯甲酸的酯在不同条件下反应,分别通过α-芳基烯酮N,S-乙缩醛和α-芳基烯酮优先提供2-甲硫基-3-芳基喹啉酮和2-苯胺基-3-芳基喹啉。氨基中间体。2-甲硫基-3-芳酰基喹诺酮与肼的环化反应既得到吡唑并[3,4- b ]喹诺酮和吡唑并[4,3- c ]喹啉,其选择性由所用反应条件确定。2-苯胺基-3-芳酰基喹啉的分子内环缩合以高收率产生了喹[2,1- b ]喹唑啉。
A methodology for the synthesis of highly functionalized 2- and 4-aminoquinoline derivatives
作者:Bo Hyun Hwang、Sung Hee Park、Eun Bok Choi、Chwang Siek Pak、Hyeon Kyu Lee
DOI:10.1016/j.tet.2008.05.014
日期:2008.7
for the synthesis of 2- and 4-aminoquinoline derivatives, which takes advantage of selective activation of 2- or 4-substituent of 2-methylsulfanyl-3-acyl-1H-quinolin-4-one 1, has been developed. Since a procedure for formation of 3-aminoquinolinones from the 4-quinolinone 1 was described previously, the new methodology comprises a general methodology for the selective syntheses of three isomeric 2-, 3-