Selective carbomethoxylation of aromatic diamines with mixed carbonic acid diesters in the presence of phosphorous acids

被引：43

作者：

Aresta, M ^{[1
]}

Dibenedetto, A ^{[1
]}

Quaranta, E ^{[1
]}

机构：

[1] Univ Bari, Dipartmento Chim, I-70126 Bari, Italy

来源：

GREEN CHEMISTRY | 1999年 / 1卷 / 05期

关键词：

D O I：

10.1039/a904624k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The reactivity of industrially relevant amines, 4,4'-methylenedianiline (MDA) and 2,4-diaminotoluene (TDA), towards methylphenylcarbonate (MPC), in the presence of Ph2P(O)OH, has been investigated. Both MDA and TDA are catalytically and selectively converted into mono- and di-methylcarbamate esters. Under the relatively mild working conditions used, the formation of ureas and/or N-methyl derivatives is totally repressed. The full spectroscopic characterization of the compounds formed upon interaction of amines with Ph2P(O)OH is also reported. The methodology here described also holds for other mono- and di-amines, both aliphatic and aromatic.

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页码：237 / 242

页数：6

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