PROCESS FOR THE PREPARATION OF (2,2)-PARACYCLOPHANE AND DERIVATIVES THEREOF

摘要

Process for the preparation of (2,2)-paracyclophane or derivatives thereof by the Hofmann elimination of p-methylbenzyl-trimethylammonium hydroxide or derivatives thereof, in an aqueous solution of an alkali metal hydroxide, wherein said elimination is carried out in the presence of a dialkylether of mono- and poly-ethylene glycols having the formula: R - O ? CH2CH2O ? n R' (1) wherein R and R', which may be the same or different, represent alkyl groups having from 1 to 5 carbon atoms, and n is an integer from 1 to 5. Such polymers are well known as intermediates in the preparation of the corresponding poly-p-xylylenes, themselves used as coating films.