N-heterocyclic carbene-catalyzed fluorinated silyl-Reformatsky reaction of aldehydes with difluoro (trimethylsilyl) acetate
作者:Ying Wang、Fen Xing、Cheng-Zhi Gu、Wen-Juan Li、Lin He、Bin Dai、Guang-Fen Du
DOI:10.1016/j.tet.2017.06.027
日期:2017.7
N-Heterocyclic carbenes (NHCs) have been employed as highly efficient organocatalysts for fluorinated silyl-Reformatsky reaction of carbonyl compounds. In the presence of 5–10 mol % NHC A, various aldehydes and 2,2,2–trifluoroacetophenone reacted with difluoro (trimethylsilyl) acetate to produce β–hydroxy gem–difluoro esters in 20–96% yields.
N-杂环卡宾(NHC)已被用作羰基化合物的氟化甲硅烷基-Reformatsky反应的高效有机催化剂。在5-10 mol%的NHC A存在下,各种醛和2,2,2-三氟苯乙酮与乙酸二氟(三甲基硅烷基)酯反应生成β-羟基宝石-二氟酯,产率为20-96%。