A New Route for the Preparation of Substituted 2,2-Difluorostyrenes and a Convenient Route to Substituted (2,2,2-Trifluoroethyl)benzenes
作者:Ba V. Nguyen、Donald J. Burton
DOI:10.1021/jo971019w
日期:1997.10.1
The (2,2-difluoroethenyl)zinc reagent II is coupled with aryl iodides or bromides in the presence of Pd(PPh3)(4) in DMF to give the corresponding 2,2-difluorostyrenes IV. The 4-substituted (tetrafluoroaryl)copper reagents are coupled with 2,2-difluoro-1-iodoethylene (I) to produce the corresponding styrene derivatives VII. Both methods provide good yields of the coupled products. These products react with wet KF in DMF or DMSO to form the (2,2,2-trifluoroethyl)benzene derivatives VIII in good yields.
Preparation and Some Properties of Certain Fluorovinyl Iodides and Some Fluorinated Butadienes<sup>1</sup>
作者:J. D. PARK、JOHN ABRAMO、MORRIS HEIN、D. N. GRAY、J. R. LACHER