Process for the preparation of methylenedi(phenylurethane)

Details Process for the preparation of methylenedi(phenylurethane) Process for the preparation of methylenedi(phenylurethane)

C - Chemistry, Metallurgy

07

C

260/468.8

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

Patent

CA 2020098

BREVET D'INVENTION PROCEDE DE PREPARATION DE METHYLENEDI(PHENYLURETHANE) SOCIETE DITE : RHONE-POULENC CHIMIE INVENTEURS : Michel GULBELMANN Christophe ROCHIN Christian ALLANDRIEU ABREGE DU CONTENU TECHNIQUE DE L'INVENTION La présente invention concerne un procédé de préparation de méthylènedi(phényluréthane). Elle a plus particulièrement trait à la préparation de méthylènedi(phényluréthane) par condensation d'un N-phénylcarbamate d'alkyle et d'un agent méthylènant, en présence d'un acide protonique caractérisé en ce que l'acide protonique et l'acide fluorhydrique.

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