反应详情

By the method of part F of Example 45 condensation of 2-chloromethyl-4-ethoxy-6-propyl-7-methoxysaccharin (0.62 g) and 1-phenyltetrazol-5-thiol sodium salt (0.36 g initially and a small amount more after 3.5 hours reaction time, total reaction time 8 hours) and isolation of the oily product by extraction with dichloromethane and purification thereof first by column chromatography on silica gel using dichloromethane as eluant and then by crystallization of the resulting oil (0.62 g., 71% yield) from ethanol gave 2-(1-phenyltetrazol-5-yl)thiomethyl-4-ethoxy-6-propyl-7-methoxysaccharin, mp 110°-111° C.

1. customa small amount more after 3.5 hours reaction time, total reaction time 8 hours) and isolation of the oily product
2. extractionby extraction
3. customwith dichloromethane and purification
4. customby crystallization of the resulting oil (0.62 g., 71% yield) from ethanol