New thiourea organocatalysts and their application for the synthesis of 5-(1<i>H</i>-indol-3-yl)methyl-2,2-dimethyl-1,3-dioxane-4,6-diones a source of chiral 3-indoylmethyl ketenes
作者:Ewelina Najda-Mocarska、Anna Zakaszewska、Karolina Janikowska、Sławomir Makowiec
DOI:10.1080/00397911.2017.1383432
日期:2018.1.2
properties of modified thiourea organocatalysts were tested in the Friedel–Crafts alkylation of indole with 5-arylidene-2,2-dimethyl-1,3-dioxane-4,6-diones, which produces chiral 5-((1H-indol-3-yl)(aryl)methyl)-2,2-dimethyl-1,3-dioxane-4,6-diones. Based on a tentative reaction mechanism for ((S)-N-benzyl-2-(3-(3,5-bis(trifluoromethyl)phenyl)thioureido)-N,3,3-trimethylbutanamide organocatalysts, modifications
摘要 在吲哚与 5-亚芳基-2,2-二甲基-1,3-二恶烷-4,6-二酮的 Friedel-Crafts 烷基化反应中测试了改性硫脲有机催化剂的立体选择性特性,该反应生成手性 5-((1H-吲哚-3-基)(芳基)甲基)-2,2-二甲基-1,3-二恶烷-4,6-二酮。基于 ((S)-N-benzyl-2-(3-(3,5-bis(trifluoromethyl)phenyl)thioureido)-N,3,3-trimethylbutanamide 有机催化剂的初步反应机理,在四个选定的区域。系统的结构-立体选择性关系研究允许设计最有效的有机催化剂,用于所研究的吲哚与 5-亚芳基-2,2-二甲基-1,3-二恶烷-4,6-二酮的 Friedel-Crafts 烷基化反应。图形摘要