Journal
TETRAHEDRON LETTERS
Volume 43, Issue 7, Pages 1217-1219Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0040-4039(01)02390-5
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At 130degreesC and in the presence of compressed CO2, primary aliphatic amines [RNH2, R=C10H21, C8H17, cHex. 1-(C10H7)CH2] react with organic carbonates (R'OCO2R': R' = Me, Et) to give alkyl carbamates (RNHCO2R', 1). Although CO2 promotes the reaction also at a low pressure, good yields (similar to80%) of 1 are achievable only with supercritical carbon dioxide (scCO(2)) at 90 bar, which inhibits the forniation of N-methylated by-products. (C) 2002 Elsevier Science Ltd. All rights reserved.
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