RFCCMgX reacts with Ac2O to give not only MeC(O)CCRF but also MeC(O)CXC(RF)C(O)Me, and with CF3COOPr it gives CF3C(O)CHC(OPr)RF not CF3C(O)CCRF; RFCCMgBr reacts with Cl2 to give RFCCBr rather than RFCCCl, while with Br2 RFCCMgI similarly gives RFCCI rather than RFCCBr.
ř ˚F用AcCCMgX发生反应2 O操作得到不仅的MeC(O)CCR ˚F而且(O)CXC(R的MeC ˚F)C(O)Me和与CF 3 COOPr它给CF 3 C(O)CHC(OPR)R ˚F不CF 3 C(O)CCR ˚F ; ř ˚F CCMgBr有Cl反应2生成R ˚F CCBr而非ř ˚F CCCl,同时用
溴2 - [R ˚F CCMgI同样给出ř ˚F CCI而非ř ˚F CCBr。