catalyst facilitated these transformations under green procedures, which enabled us to synthesize a new series of olefins and thienopyridines, and the yields of some isolated olefins and thienopyridines were up to 99% and 95%, respectively. Besides, the catalyst was stable for five cycles without a significant decrease in its reactivity, and the mechanistic routes of both reactions on the SMCNCs were
开发用于合成不同有机化合物的可
生物降解和活性
纤维素基多相催化剂将在制药和石化相关行业中具有吸引力。在此,一锅合成磁
铁矿(Fe 3 O 4)和
纤维素纳米晶体(CNC)的后磺化复合物被用作有效且易于分离的多相催化剂,用于激活Knoevenagel和Thorpe-Ziegler反应。该复合材料是由
微晶纤维素(MCC)、
氯化
铁、
尿素和
盐酸在一锅反应中在 180°C 下
水热 20 小时形成的。收集磁性CNCs(MCNCs)后,在室温下使用
氯磺酸(ClSO 3 H)在
DMF中进行后磺化,产生磺化MCNCs(SMCNCs)。结果证实了磺化 Fe 3 O 4和流体动力学尺寸为 391 nm (±25) 的 CNC的存在。
纤维素的存在有利于防止Fe 3 O 4氧化或团聚的形成,而不需要封端剂、有机溶剂或惰性环境的存在。应用SMCNC催化剂激活Knoevenagel缩合反应和Thorpe-Ziegler反应,