A new method for the synthesis of the tit1e compounds 6 is described in this paper. Compounds 6 were obtained by an one-pot reaction process from β-dione and its analogues, 2-bromoethanol and carbon disulfide with po...A new method for the synthesis of the tit1e compounds 6 is described in this paper. Compounds 6 were obtained by an one-pot reaction process from β-dione and its analogues, 2-bromoethanol and carbon disulfide with potassium carbonate as the base. The possible mechanism is discussed. In this mechanism, a monoanion intermediate 3 is proposed, it reacts with 2-bromoethanol by a sequential nucleophilic and electrophilic reaction process to build the key intermediate 5. 6 is formed by the elimination of hydrosulfide from 5.展开更多
以L-薄荷醇为原料,经3步反应制备得到中间体薄荷基二氯化膦.该中间体首先通过与超声波辐射制备的微米级钠粒反应形成薄荷基膦二钠盐,然后依次经过偶联及氧化反应合成了目标产物(-)-双(薄荷基甲酰基)薄荷基氧化膦(BMMPO),并经过1 H NMR、...以L-薄荷醇为原料,经3步反应制备得到中间体薄荷基二氯化膦.该中间体首先通过与超声波辐射制备的微米级钠粒反应形成薄荷基膦二钠盐,然后依次经过偶联及氧化反应合成了目标产物(-)-双(薄荷基甲酰基)薄荷基氧化膦(BMMPO),并经过1 H NMR、13 C NMR、31P NMR和元素分析进行了表征.展开更多
文摘A new method for the synthesis of the tit1e compounds 6 is described in this paper. Compounds 6 were obtained by an one-pot reaction process from β-dione and its analogues, 2-bromoethanol and carbon disulfide with potassium carbonate as the base. The possible mechanism is discussed. In this mechanism, a monoanion intermediate 3 is proposed, it reacts with 2-bromoethanol by a sequential nucleophilic and electrophilic reaction process to build the key intermediate 5. 6 is formed by the elimination of hydrosulfide from 5.
文摘以L-薄荷醇为原料,经3步反应制备得到中间体薄荷基二氯化膦.该中间体首先通过与超声波辐射制备的微米级钠粒反应形成薄荷基膦二钠盐,然后依次经过偶联及氧化反应合成了目标产物(-)-双(薄荷基甲酰基)薄荷基氧化膦(BMMPO),并经过1 H NMR、13 C NMR、31P NMR和元素分析进行了表征.