Indium(III) chloride was found to be a highly effective and efficient catalyst for the three-component, one-pot coupling of aldehydes, β-naphthol, and 6-amino-1,3-dimethyluracil under solvent-free conditions to give 8,10-dimethyl-12-aryl-12H-naphtho[1′,2′:5,6]pyrano[2,3-d]pyrimidine-9,11-diones in high yields for the first time. No co-catalyst or activator is required. Water and ammonia are the only byproducts in the reactions.
铟(III)
氯化物被发现是一种高效且有效的催化剂,能够在无溶剂条件下实现醛、β-
萘酚和6-
氨基-1,3-二甲基尿
嘧啶的三组分、一锅反应的偶联,首次高产率地合成8,10-二甲基-12-芳基-12H-
萘[1′,2′:5,6]
吡喃[2,3-d]
嘧啶-9,11-二酮。反应中不需要任何共催化剂或活化剂。
水和
氨是反应中的唯一副产物。