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Table 1 Products, yields, and melting points related to Scheme 3

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 89 184-185 184-185 [27, 28]
2g 80 148-149 147-148 [29]
2h 83 167-168  
2i 86 202-204 203 [27]