期刊
CATALYSIS LETTERS
卷 97, 期 1-2, 页码 41-47出版社
SPRINGER
DOI: 10.1023/B:CATL.0000034285.05419.7e
关键词
carbamates; urethanes; phosgene-free synthesis; carbon dioxide utilization; titanosilicates; zeolite-encapsulated metal complexes; metal phthalocyanines; TS-1; Ti-MCM-41; Ti-SBA-15
Alkyl and aryl carbamates are synthesized in high yields (greater than or equal to80%) at mild reaction conditions by reaction of the corresponding amine, CO2 and alkyl halides over either titanosilicate molecular sieves or metal phthalocyanine complexes encapsulated in zeolite-Y. The catalysts could be reused with little or no loss in activity. In contrast to hitherto known catalysts for carbamate synthesis, the zeolite-based catalysts of the present study do not require additional onium salts as co-catalysts.
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