From: One-pot synthesis of 2-substituted 4H-3,1-benzoxazin-4-one derivatives under mild conditions using iminium cation from cyanuric chloride/dimethylformamide as a cyclizing agent
No.
Product
Yield (%)
mp (T/ oC)
Lit. mp (T/oC)
2a
86
123-124
123-125 [26]
2b
89
236-238
2c
78
106-108
2d
79
89-91
2e
82
261-263
2f
184-185
184-185 [27, 28]
2g
80
148-149
147-148 [29]
2h
83
167-168
2i
202-204
203 [27]
