Process for the preparation of (2,2)-paracyclophane and...

Details Process for the preparation of (2,2)-paracyclophane and... Process for the preparation of (2,2)-paracyclophane and...

C - Chemistry, Metallurgy

07

C

260/653.1, 260/6

C07C 1/32 (2006.01) C07C 13/70 (2006.01) C07C 17/26 (2006.01) C07C 25/22 (2006.01)

Patent

CA 1286694

ABSTRACT OF THE DISCLOSURE 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.

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