RCH=CHR' or XZ-AgNO3 ^ (RCHXCHFR) -f RCHFCHFR' (X = Br or I) (60-95%)A simple variation of this procedure affords a-fluoro-(3-nitroalkanes: the alkene is added to a solution of nitronium tetrafluoroborate dissolved in pyridinium poly(hydrogen fluoride), a procedure which eliminates the problem of polymerization usually found in reactions conducted in anhydrous hydrogen fluoride [10], e.g. MeCH=CH2 + [NO21+[BF4]--in PPHF McCHFCH2NO2.Reactions with alcohols [9,11 ] Secondary and tertiary alcohols are readily converted to the corresponding fluorides oy pyridinium poly(hydrogen fluoride). With tertiary Across Conventional Lines Downloaded from www.worldscientific.com by PURDUE UNIVERSITY on 04/13/15. For personal use only.

Zur Untersuchung auf carcinogenes Verhalten werden zahlreiche Oxonium‐Verbindungen untersucht, deren Herstellung z.Tl. beschrieben ist.

No abstract