Summary: Using tetra-alkylammonium halides dissolved in alkyl halides as reagents a variety of halogen exchange reactions can be carried out conveniently in high yield. In particular, it becomes practicable to use -CH2Cl as a protected equivalent of -CH2Br. ... In work on the synthesis of aliphatic compounds of very long chain-length 192 two anti- thetical problems arose. The first was the undesired conversion of primary bromides to chlorides; as these are some 250 ...
