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 13/70 (2006.01) C07C 1/32 (2006.01) C07C 17/00 (2006.01) C07C 25/22 (2006.01)

Patent

CA 1255704

ABSTRACT OF THE DISCLOSURE Process for the preparation of (2,2)-paracyclophane or derivatives thereof by the Hofmann elimination of p.methyl- benzyltrimethylammonium hydroxide or derivatives thereof, in an aqueous solution of an alkali metal hydroxide, wherein said elimination is carried out in the presence of ketone of the formula: CH3 - CO - CH2 R (I) wherein R is hydrogen, a halogen, or an alkyl-carboxylic gorup. The process proudces the derivatives in a pure form, with high industrial yields, such as higher than 25% by mols.

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