Suzuki–Miyaura Coupling Reactions of Iodo(difluoroenol) Derivatives, Fluorinated Building Blocks Accessible at Near-Ambient Temperatures
作者:Peter G. Wilson、Jonathan M. Percy、Joanna M. Redmond、Adam W. McCarter
DOI:10.1021/jo3011705
日期:2012.8.3
A recently developed method for the near-ambient generation of difluorovinylzinc reagents has facilitated the preparation of 1-(N,N-diethylcarbamoyloxy)-2,2-difluoro1-iodoethene and 2,2-difluoro-1-iodo-1-(2'-methoxyethoxymethoxy)ethene. The utility of these reagents has been investigated in Suzuki-Miyaura couplings with a range of potassium trifluoroborate coupling partners, with the scope of successful couplings proving wide. Deiodinated species appeared as significant side products, but a solvent change from i-PrOH to t-BuOH suppressed the pathway to these species and improved coupling yields.
New fluorine-containing building blocks from trifluoroethanol. 2.
作者:Judith A. Howarth、W. Martin Owton、Jonathan M. Percy、Michael H. Rock
DOI:10.1016/0040-4020(95)00588-y
日期:1995.9
A new fluorine containing acyl anion equivalent 1,1 -difluoro-2-lithio-2-[(N,N-diethylcarbamato)-ethene 9 has been prepared and trapped with a number of electrophiles in good yields. Transacylation of the first formed lithium alkoxides releases a difluoroenolate, affording difluoromethylketones upon work-up.
DeBoos, Gareth A.; Fullbrook, Jeremy J.; Owton, W. Martin, Synlett, 2000, # 7, p. 963 - 966
作者:DeBoos, Gareth A.、Fullbrook, Jeremy J.、Owton, W. Martin、Percy, Jonathan M.、Thomas, Andrew C.