Direct Transformation of <i>N</i>,<i>N</i>-Dimethylformamide to −CN: Pd-Catalyzed Cyanation of Heteroarenes via C–H Functionalization
作者:Shengtao Ding、Ning Jiao
DOI:10.1021/ja204063z
日期:2011.8.17
This paper describes the direct cyanation of indoles and benzofurans employing N,N-dimethylformamide (DMF) as both reagent and solvent. Isotopic labeling experiments indicated that both the N and the C of the cyano group derived from DMF. This transformation offers an alternative method for preparing aryl nitriles, though it is currently limited in scope to indoles and benzofurans.
本文介绍了使用 N,N-二甲基甲酰胺 (DMF) 作为试剂和溶剂对吲哚和苯并呋喃进行直接氰化。同位素标记实验表明,氰基的 N 和 C 均来自 DMF。这种转化提供了一种制备芳基腈的替代方法,但目前仅限于吲哚和苯并呋喃。
Lewis Acid Catalyzed Direct Cyanation of Indoles and Pyrroles with <i>N</i>-Cyano-<i>N</i>-phenyl-<i>p</i>-toluenesulfonamide (NCTS)
作者:Yang Yang、Yan Zhang、Jianbo Wang
DOI:10.1021/ol202335p
日期:2011.10.21
BF3·OEt2-catalyzed direct cyanation of indoles and pyrroles using a less toxic, bench-stable, and easily handled electrophilic cyanating agent N-cyano-N-phenyl-para-toluenesulfonamide (NCTS) affords 3-cyanoindoles and 2-cyanopyrroles in good yields with excellent regioselectivity. The substrate scope is broad with respect to indoles and pyrroles.