Synthesis of 7′-Arylidenespiro[indoline-3,1′-pyrrolizines] and 7′-Arylidenespiro[indene-2,1′-pyrrolizines] via [3 + 2] Cycloaddition and β-C–H Functionalized Pyrrolidine
作者:Ying Huang、Hui-Lin Fang、Yi-Xin Huang、Jing Sun、Chao-Guo Yan
DOI:10.1021/acs.joc.9b01920
日期:2019.10.4
three-component reaction of pyrrolidine, aromatic aldehydes, and 3-arylideneoxindolin-2-ones in refluxing toluene afforded functionalized 7'-arylidenespiro[indoline-3,1'-pyrrolizines] in good yields and with high diastereoselectivity. The similar three-component reaction with 2-arylidene-1,3-indanediones also gave 7'-arylidenespiro[indene-2,1'-pyrrolizines] in good yields. However, the reaction with 3-ph
乙酸在回流的甲苯中催化吡咯烷,芳族醛和3-芳基氧杂吲哚-2-酮的三组分反应,可提供高收率和高非对映选择性的功能化7'-芳基螺[吲哚啉-3,1'-吡咯烷酮]。与2-亚芳基-1,3-茚满二酮的相似的三组分反应也以良好的产率得到了7'-亚芳基螺[茚-2,1'-吡咯烷酮]。然而,与3-苯乙叉基亚吲哚的反应以中等收率产生了螺[吲哚啉-3,1'-吡咯嗪]和7'-亚芳基取代的螺氧并吲哚的混合物。反应机理包括偶氮甲亚胺的生成,吡咯烷的β-CH官能化以及连续的[3 + 2]环加成反应。