2-(Arylamino)aryliminophosphoranes from 2-nitrodiarylamines
作者:Emilia Łukasik、Zbigniew Wróbel
DOI:10.1002/hc.21348
日期:2016.11
presented as an efficient method for synthesis of 2-(arylamino)aryliminophosphoranes, useful as starting materials in the synthesis of benzannulated nitrogen heterocycles. The reaction is complementary for the known synthesis of aryliminophosphoranes from2-nitrosodiarylamines giving rise to obtain the title products in the broader scope. The presented protocol is simple and efficient although limited to
Nitro dyestuffs, a process for their preparation, and use of these
申请人:L'Oreal
公开号:US04432769A1
公开(公告)日:1984-02-21
Compounds having the general formula: ##STR1## in which R denotes hydrogen, a lower alkyl, lower hydroxyalkyl or lower polyhydroxyalkyl radical or alternatively an alkyl, hydroxyalkyl or polyhydroxyalkyl radical in which the alkyl chain is interrupted by one or more hetero-atoms such as oxygen are described. These compounds can be used in dyeing compositions for keratin fibres and wavesetting lotions. They make it possible to obtain very strong shades.
anes, which were subjected, without isolation, to various cyclocondensation reactions with CS2, CO2, alkyl isocyanates, acyl chlorides, anhydrides, or esters. A simple, convenient, one-pot procedure provided derivatives of unsymmetrically substituted 1-alkylbenzimidazoles functionalized at C2 in good to excellent yields. The method does not require the use of metals, sensitive catalysts, or pressure