Patent ID: 7022846

Claim:
A process for synthesizing a compound of formula 11, N-hydroxy-4-(4-((1-oxy-pyrid-4-yl)oxy)benzenesulfonyl)-2,2-dimethyl-tetrahydro-2H-1,4-thiazine-3-carboxamide, comprising the steps of: (i) protecting a compound of formula 1 with a protecting group, P 1 , to form a compound of formula 2 (ii) activating the compound of formula 2 with an activating agent, A 1 , to form a compound of formula 3 (iii) coupling the compound of formula 3 with a compound of formula 4 having an ester, E 1 to form a compound of formula 5 (v) removing the protecting group, P 1 , from the compound of formula 5 to form a compound of formula 6 (vi) coupling the compound of formula 6 with p-nitro pyridine N-oxide, a compound of formula 7 to form a compound of formula 8 (vii) removing the ester, E 1 , from the compound of formula 8 to form a compound of formula 9 (vii) activating the compound of formula 9 with an activating agent, A 2 , to form a compound of formula 10 (viii) treating the compound of formula 10 with hydroxylamine to form the compound of formula 11