A One-Pot Biginelli Synthesis of 6-Unsubstituted 5-Aroylpyrimidin-2(1H)-ones and 6-Acetyl-1,2,4-triazin-3(2H)-ones
摘要:
AbstractThe three‐component Biginelli‐like cyclocondensation reaction of enamines 1, urea, and aldehydes in dioxane/acetic acid efficiently afforded the corresponding 6‐unsubstituted 3,4‐dihydropyrimidin‐2(1H)‐ones 2 in good yields (Scheme 1, Table). The corresponding reaction of azaenamine (=hydrazone) 7 with benzaldehyde and urea afforded 6‐acetyl‐1,2,4‐triazin‐3(2H)‐ones in good yields (Scheme 3).
AbstractThe three‐component Biginelli‐like cyclocondensation reaction of enamines 1, urea, and aldehydes in dioxane/acetic acid efficiently afforded the corresponding 6‐unsubstituted 3,4‐dihydropyrimidin‐2(1H)‐ones 2 in good yields (Scheme 1, Table). The corresponding reaction of azaenamine (=hydrazone) 7 with benzaldehyde and urea afforded 6‐acetyl‐1,2,4‐triazin‐3(2H)‐ones in good yields (Scheme 3).