| 摘要 |
Prodn. of carbamic acid derivs. of formula R1R2N.CO.Y (I) is effected by reacting amines of formula R1R2NH (II) with 1-haloalkyl carbonate derivs. of formula R5-CHX-O-CO-Y (III) at -5 to +150 deg.C. in the presence of an acid binder: R1 and R2 = H or opt. substd. satd. or unsatd. aliphatic, araliphatic, cycloaliphatic or heterocyclic gps., or NR1R2 is an opt. substd. satd. or unsatd. ring opt. contg. other heteroatoms and/or forming part of a ring system; Y = OR, SR, NR3R4 or ON=CR6R7; R = opt. substd. aryl or an opt. substd. satd. or unsatd. aliphatic, araliphatic or cycloaliphatic gp.; R3 and R4 = H, opt. substd. aryl or opt. substd. satd. or unsatd. aliphatic, araliphatic, cycloaliphatic or heterocyclic gps., or NR3R4 is an opt. substd. satd. or unsatd. ring opt. contg. other heteroatoms; R6 = H, alkylthio, alkoxy or an opt. substd. satd. or unsatd. aliphatic or cycloaliphatic gp.; R7 = an opt. substd. satd. or unsatd. aliphatic or cycloaliphatic gp.. R5 = H, opt. substd. aryl or an opt. substd. satd. or unsatd. aliphatic, araliphatic or cycloaliphatic gp..
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