| 摘要 |
<p>A process for the preparation of 3,4-dihydro-1,4-benozthiazine of the formula (1) which comprises, condensing of 2-aminothiophenol with dihaloethane of formula (11) wherein X represents halogen atom in presence of organic base and relatively non polar solvent at a temperature in the range of 40-80 °C followed by cyclization and formation of organic salt as by product and isolating the compound of formula (1) by conventional methods.</p> |
