Collect. Czech. Chem. Commun. 1995, 60, 2209-2212

Synthesis of Disubstituted 6-Chloro-5-methyl-4H-1,4-benzothiazines: Novel Heterocycles

Ram K. Rathorea and Radha R. Guptab

a Central Forensic Science Laboratory, Government of India, Sector 18A, Chandigarh-160 018, India
b Chemistry Department, Rajasthan University, Jaipur, India


2-Amino-4-chloro-3-methylbenzenethiol in the form of dimer condensed with 8 β-diketones or β-ketoesters to form an enaminoketone or ester intermediate which underwent spontaneous oxidative cyclization to form 6-chloro-5-methyl-2,3-disubstituted 4H-1,4-benzothiazines.