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.
A Practical and Highly Efficient Synthesis of α-(Trimethylsilyl)-difluoroacetates
作者:Hideki Amii、Takeshi Kobayashi、Kenji Uneyama
DOI:10.1055/s-2000-8718
日期:——
An efficient method for the gram scale preparation of α-(trimethylsilyl)difluoroacetates is described. The key step involves Mg(0)-promoted selective C-F bond cleavage of readily available trifluoroacetates.