base‐promoted nucleophilic addition of arylacetonitriles to terminal alkynes has been described for the first time, providing a simple and straightforward protocol for the synthesis of a range of structurally diverse (Z)‐2,3‐disubstituted acrylonitriles in moderate to excellent yields. Of particular note, the transition metal‐free carbon‐carbon double bond forming reaction is regio‐ and stereoselective under
CsOH · H2O wird als Katalysator bei der Alkenylierung von organischen Verbindungen, die Gruppen -NH, -OH oder >CH-Z
mit Z = CN, COOR
mit R = H oder C1-6-Alkyl
enthalten, mit Ausnahme von 1,2-Aminoalkanolen, durch Umsetzung der Gruppen mit organischen Verbindungen, die eine C-C-Dreifachbindung enthalten, verwendet.
N-Methylpyrrolidon wird als Lösungsmittel verwendet.
CsOH - H2O 可作为催化剂,用于含有 -NH、-OH 或 >CH-Z 基团的有机化合物的烯化反应。
Z = CN、COOR
其中 R = H 或 C1-6 烷基
1,2-氨基烷醇除外)的有机化合物进行烯化反应时使用的催化剂。
N 甲基吡咯烷酮可用作溶剂。
Palladium‐Catalyzed C−H Alkenylation of α‐Aryl Alkyl Nitriles
作者:Jingwen Wang、Zhonglin Tao
DOI:10.1002/cctc.202301730
日期:2024.7.8
The direct α-alkenylation of nitrile was realized with palladium catalyst for the first time. Both cyano group and alkenyl group in the product can be functionalized, rendering this method a powerful protocol to synthesis a series of useful compounds.
The efficient addition of terminal alkynes to aldehydes or ketones to give propargyl alcohols in yields of 66-96 % can be achieved by activation with catalytic amounts of CsOH⋅H2 O [Eq. (a)]. A CsOH-catalyzed addition of acetonitrile derivatives to terminal alkynes is also possible.