Process for the preparation of dicyclopentylene...

Details Process for the preparation of dicyclopentylene... Process for the preparation of dicyclopentylene...

C - Chemistry, Metallurgy

07

C

260/617.2

C07C 39/17 (2006.01) C07C 37/14 (2006.01)

Patent

CA 1131254

ABSTRACT OF THE DISCLOSURE A PROCESS FOR THE PREPARATION OF DICYCLOPENTYLENE [2,2'-bis(4-ALKYL-6-t-BUTYLPHENOLS)] . The invention concerns a-process for the preparation of dicyclopentylene [2,2'- bis(4-alkyl-6-t-butylphenols)] of the formula I Image (I) wherein R1 is tertiary butyl and R2 is methyl or ethyl, by the reaction of 1.5 to 2.5 moles of a 4-alkyl-6-t-butyl-phenol of the formula II Image wherein R1 and R2 are as defined above, with 0.8 to 1.2 moles dicyclopentadiene at a temperature between 20 and 120° C in the presence of an organic solvent and borontrifluoride or a complex thereof as catalyst, characterised by employment of specially selected solvents and reaction under practically anhydrous conditions.

331612

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