PROCESS FOR THE PREPARATION OF 7 alpha -(METHOXYCARBONYL)-3-OXO-17alpha-PREGN-4,9(11)-DIEN-21,17-CARBOLACTONE, A USEFUL INTERMEDIATE FOR THE SYNTHESIS OF MOLECULES WITH PHARMACOLOGICAL ACTIVITY
The facile preparation of HF free polyfluorinated acyl fluorides [1]
作者:Daryl G. Cox、Lee G. Sprague、Dgnald J. Burton
DOI:10.1016/s0022-1139(00)81221-x
日期:1983.10
The reaction of polyfluorinated acids with the Ishikawa Reagent (FAR) in the presence of NaF gives 59–91% isolated yields of HF free polyfluorinated acyl fluorides. The reaction is rapid, safe, easily scaled up, and amenable to a one-pot procedure.
N-Perhalofluoroalkylation of secondary amines by the reactions of the amines and amides with perhalofluoroalkanes. Halophilic attack on nitrogen nucleophile on CBr bond.
作者:Xing-ya Li、He-qi Pan、Xi-kui Jiang
DOI:10.1016/s0040-4039(00)96359-7
日期:1987.1
Secondaryamines and amides react spontaneously with perhalofluoroalkanes CF2BrCFBrX(X = F, Cl, CF3) to afford N-perhalofluoroalkylated tertiary amines in fair to good yields. Evidence for an anionic chain process initiated by the bromophilic attack of nitrogen nucleophiles on CBr bonds is given.