描述了双歧性N-杂环卡宾配体吲哚-2-亚烷基(IdY,A)的合成。以克为单位制备了一系列吲哚前体(2 a - f),收率很高。用元素硒,[RhCl(cod)] 2和CuCl进行的捕集实验提供了预期的卡宾加合物。进一步的计算和光谱研究支持了IdY的歧义性,它位于环状(烷基)(氨基)卡宾(CAAC-5)和环状(氨基)(芳基)卡宾(CAArC)之间。铜络合物(6)的掩埋体积百分比高(% V bur = 58.1),并允许在30分钟内对末端炔烃进行碳硼化,以证明合成实用性高收率和高区域选择性。
<i>N</i>-Indolyltriethylborate: A Useful Reagent for Synthesis of C3-Quaternary Indolenines
作者:Aijun Lin、Jiong Yang、Mohamed Hashim
DOI:10.1021/ol4005992
日期:2013.4.19
N-Indolyltriethylborate was found to be a useful reagent for dearomatizing C3-alkylation of 3-substituted indoles with both activated and nonactivated alkyl halides to give C3-quaternary indolenines, pyrroloindolines, furoindoline, and hexahydropyridoindoline under mild reaction conditions. The utility of these reagents was demonstrated in the syntheses of a pyrroloindoline-4-cholestene hybrid and debromoflustramine B.
Palladium-Catalyzed C3-Benzylation of Indoles
作者:Ye Zhu、Viresh H. Rawal
DOI:10.1021/ja2095393
日期:2012.1.11
A general method for regioselective C3-benzylation of indoles has been developed. Various 3-substituted indoles and benzyl methyl carbonates with different electronic properties react under mild conditions to afford a diverse range of 3-benzylindolenine products in good yields.