Patent ID: 7767843

Claim:
A process for the preparation of aminoalkyl phenyl carbamate compounds of Formula I, wherein R 1 is hydrogen; R 2 is methyl; R 3 and R 4 are methyl; R 5 is methyl; R 6 is ethyl; and the carbon centre designated “*” is racemic, enantiomerically enriched in the (R)-configuration or enantiomerically enriched in the (S)- configuration; and pharmaceutically acceptable acid addition salts thereof comprising the steps of: 1) reacting in a solvent at a controlled reaction temperature the compound of Formula II, wherein R 1 , R 2 , R 3 , R 4 and “*” are as defined above, with a carbonylating agent to form the compound of Formula III wherein R 1 ,R 2 ,R 3 ,R 4 and “*” are as defined above and X is a leaving group, followed by: 2) reacting in a solvent at a controlled reaction temperature the compound of Formula III with an amine R 5 R 6 NH, wherein R 5 and R 6 are as defined above, to form the compound of Formula I.