NHC-Catalyzed ε-Umpolung via <i>p</i>-Quinodimethanes and Its Nucleophilic Addition to Ketones
作者:Lei Dai、Song Ye
DOI:10.1021/acscatal.9b04409
日期:2020.1.17
An unprecedented NHC-catalyzed generation of p-quinodimethanes via ε-umpolung of 4-(chloromethyl)benzaldehydes and the following ε-addition to active ketones was developed. A series of active ketones, such as trifluoromethyl ketones and 1,2-dicarbonyl compounds, worked well for the reaction, giving the corresponding trifluoromethyl alcohols and α-hydroxyl carbonyl compounds in good yields.
开发了一种空前的NHC催化产物,它是通过4-(氯甲基)苯甲醛的ε-苯甲酸酯和随后的ε-添加到活性酮中而生成的对-喹二甲烷。一系列活性酮,例如三氟甲基酮和1,2-二羰基化合物,对反应反应良好,从而以高收率得到相应的三氟甲基醇和α-羟基羰基化合物。