Direct and Waste-Free Amidations and Cycloadditions by Organocatalytic Activation of Carboxylic Acids at Room Temperature
作者:Raed M. Al-Zoubi、Olivier Marion、Dennis G. Hall
DOI:10.1002/anie.200705468
日期:2008.3.31
Copper-Catalyzed Synthesis of Hindered Ethers from α-Bromo Carbonyl Compounds
作者:Zhe Zhou、Nicole Erin Behnke、László Kürti
DOI:10.1021/acs.orglett.8b02371
日期:2018.9.7
A catalytic method for the synthesis of sterically hindered ethers and thioethers from α-bromo carbonyl compounds and the corresponding nucleophiles using an inexpensive Cu(I) catalytic system is reported. This facile transformation takes place at ambient temperature and does not require the exclusion of air or moisture; thus, it is well-suited for the functionalization and derivatization of complex
their catalytic activity comparable or even superior to that of the corresponding free boronic acid monomers homogeneously dispersed in solutions and, more importantly, making these boronic-acid-containing polymer microgels able to catalyze alternate reactions that may extend the usefulness. This enhanced catalytic function of these boronic-acid-containing microgels as organoboron acid catalysts is plausibly
固定在聚合物微凝胶中的硼酸的催化作用可以通过用 N 2 /CO 2气体鼓泡来调节,在某些情况下还可以通过添加葡萄糖来调节,使其催化活性与均匀分散的相应游离硼酸单体的催化活性相当甚至更好。解决方案,更重要的是,使这些含硼酸的聚合物微凝胶能够催化可能扩展用途的替代反应。这些含硼酸的微凝胶作为有机硼酸催化剂的这种增强的催化功能似乎是通过原位实现的可逆的结构变化。为了更好地理解催化过程,已经对模型硼酸催化的aza-Michael加成、醛醇、酰胺化和[4 + 2]环加成反应进行了动力学研究。