The oxidant iodosobenzene diacetate was combined with the cheap,environment-friendly FeCl3 as a chloride source to produ......

A highly efficient total synthesis of S-(+)-tylophorine has been accomplished in fully asymmetric fashion. A highly eff......

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......

在以三甲氧基苯甲醛为原料合成三甲氧苄二氨嘧啶的环化工艺中,提出了改1次回流为2次回流、环化阶段加入溶剂使反应从原来的固相状......

以3，5-二甲基-1／／-吡咯-2-甲酸乙酯（2）为起始原料，与新型Vilsmeier试剂反应得4-甲酰基-3，5-二甲基-1H-吡咯-2-甲酸乙酯（3）；3与3，4-二氨基二苯......

A theoretical approach to polycondensation reaction of Aa-Bb type Involving intramolecular cycllzatlon has been proposed......