Process for the preparation of methylenedi (phenylurethane)

C - Chemistry – Metallurgy – 07 – C

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260/468.8

C07C 269/06 (2006.01) C07C 271/28 (2006.01)

Patent

CA 2020099

BREVET D'INVENTION PROCEDE DE PREPARATION DE METHYLENEDI(PHENYLURETHANE) INVENTEURS : Michel GUBELMANN Christophe ROCHIN Christian ALLANDRIEU ABREGE DU CCONTENU TECHNIQUE DE L'INVETION La présente invention concerne un procédé de préparation de méthylènedi(phényluréthane). Elle a plus particulièrement trait à la préparation de méthylènedi(phényluréthane) par réarrangement de bis (N-carboalcoxyanilino) méthanes, le cas échéant en présence d'au moins un N-phénylcarbarmate d'alkyle caractérisé en ce que le réarrangement est réalisé en présence d'acide fluorhydrique.

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