Process of preparing O-carbamoyl compounds in the presence of active amine group
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United States of America Patent
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Issued Date -
Mar 16, 2006
app pub date -
Nov 3, 2005
filing date -
Oct 8, 2003
priority date (Note) -
Abandoned
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Abstract
A process for preparing O-carbamoyl aminoalcohols represented by Formula I wherein: n is an integer from 0 and 5; R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are individually selected from the group consisting of hydrogen, alkyl, cycloalkyl, substituted or unsubstituted aryl and arylalkyl the aryl portion of which may be unsubstituted or substituted: R.sub.5 and R.sub.6 are individually selected from the group consisting of hydrogen, alkyl or arylalkyl the aryl portion of which may be unsubstituted or substituted; or R.sub.1 and R.sub.5 together with the carbon and nitrogen to which they are attached may form an unfused or fused heterocyclic ring having from 4 to 10 members. comprising reacting an aminoalcohol represented by Formula II wherein n, R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are as defined; with a cyanate and an excess of an acid in an organic solvent medium.
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