Alkylation of 1,1,3-trioxo-2H,4H-thieno[3,4-e][1,2,4]thiadiazine (I) at the N-2 with benzyl chloride (II) in the presence of NaH in DMF yielded the 2-benzyl derivative (III), which was further alkylated with 2-chlorobenzyl chloride (IV) at the N-4 to provide the title compound.
Alkylation of 1,1,3-trioxo-2H,4H-thieno[3,4-e][1,2,4]thiadiazine (I) at the N-2 with 3-chlorobenzyl chloride (II) in the presence of NaH in DMF yielded the 2-benzyl derivative (III), which was further alkylated with chloroacetonitrile (IV) at the N-4 to provide the title compound.
Alkylation of 1,1,3-trioxo-2H,4H-thieno[3,4-e][1,2,4]thiadiazine (I) at the N-2 with 3-fluorobenzyl chloride (II) in the presence of NaH in DMF yielded the 2-benzyl derivative (III), which was further alkylated with chloroacetonitrile (IV) at the N-4 to provide the title compound.