Document Type and Number:
Japanese Patent JPS646192
Kind Code:
B2
Abstract:
Diaminophenyl ureas of the formula in which R is an inert substituent, are obtained from the corresponding dinitrophenyl urea by way of reduction, especially catalytic hydrogenation. Through a cyclization process, while splitting off ammonia, these ureas yield the corresponding aminobenzimidazolones, advantageously without an intermediate isolation of the diaminophenyl ureas.
Inventors:
OTSUTOO ARUNTO
TEODOORU PAAPENFUUSU
PEETERU BEEME
UORUFUGANGU TORONITSUHI
BERUNHARUTO MEESU
TEODOORU PAAPENFUUSU
PEETERU BEEME
UORUFUGANGU TORONITSUHI
BERUNHARUTO MEESU
Application Number:
JP16574379A
Publication Date:
February 02, 1989
Filing Date:
December 21, 1979
Export Citation:
Assignee:
HOECHST AG
International Classes:
C07B61/00; C07C67/00; C07C239/00; C07C275/40; C07D235/02; C07D235/26
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