反应详情

A solution of 6-acetoxy-2-methylbenzo[d][1,3]oxazin-4-one (143 g, 0.653 mol) in 1.44 L of glacial acetic acid was stirred overnight with sodium azide (44.66 g, 0.687 mol). The solution was concentrated under reduced pressure and toluene (1.2 L) was then added. After stirring for one hour, a solid formed. The solid was recovered by filtration and then dried overnight under reduced pressure. The solid was dissolved in 2 L of water and the pH was adjusted to 1 with concentrated hydrochloric acid. After stirring for 3 hours, the resulting solid was filtered and dried overnight under a flow of air to give 164.1 g of 5-acetoxy-2-(5-methyltetrazol-1-yl)benzoic acid as an off white solid.

1. concentrationThe solution was concentrated under reduced pressure and toluene (1.2 L)
2. additionwas then added
3. customa solid formed
4. filtrationThe solid was recovered by filtration
5. customdried overnight under reduced pressure
6. dissolutionThe solid was dissolved in 2 L of water
7. stirringAfter stirring for 3 hours
8. filtrationthe resulting solid was filtered
9. customdried overnight under a flow of air