Tetrahedron letters

The syntheses of carbamates from reactions of primary and secondary aliphatic amines with dimethyl carbonate in ionic liquids

T Sima, S Guo, F Shi, Y Deng

Index: Sima, Tianlong; Guo, Shu; Shi, Feng; Deng, Youquan Tetrahedron Letters, 2002 , vol. 43, # 45 p. 8145 - 8147

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Citation Number: 76

Abstract

At 170° C and using ionic liquids as solvent and catalyst, primary and secondary aliphatic amines could react with dimethyl carbonate to give alkyl carbamates with good yield. Due to its insolubility, the desired carbamate solid could be recovered by simple filtration from the two-layer mixture of dimethyl carbonate and ionic liquid after reaction and the formation of N- methylated and deammoniated products were restrained.

~10%

~97%

~78%

Detail

~96%

~10%

~87%

Detail

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