吸附于硅胶的高氯酸在无溶剂或甲醇/乙醇作为溶剂,可催化醛/酮与原甲酸三甲酯室温反应2～45min,生成相应的缩醛/缩酮,21例收率80%～96%......

为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......

An efficient synthesis of tetrahydroquinoline derivatives is reported via three component coupling reactions of aldehyde......