An efficient method has been developed for the one‐pot copper(I)‐catalyzed synthesis of 3‐aminocoumarin and its derivatives, such as 3‐substituted methylideneaminocoumarins and chromeno[3,4‐d]imidazol‐4(1H)‐ones. Significantly, the strategy presents a straightforward and efficient approach to constructing biologically useful molecular scaffolds.
已开发出一种有效的方法,用于一锅铜(I)催化的3-氨基香豆素及其衍生物的合成,例如3-取代的亚甲基氨基香豆素和chromeno [3,4- d ]咪唑-4(1 H)-ones 。重要的是,该策略为构建生物学上有用的分子支架提供了一种简单有效的方法。
Copper- or Phosphine-Catalyzed Reaction of Alkynes with Isocyanides. Regioselective Synthesis of Substituted Pyrroles Controlled by the Catalyst
The copper-catalyzed reaction of isocyanides (CNCH(2)EWG(1)) 1 with electron-deficient alkynes (RC equivalent to CEWG(2)) 2 gave the 2,4-di-EWG-substituted pyrroles 3 selectively, whereas the phosphine-catalyzed reaction of 1 with 2 afforded the 2,3-di-EWG-subsituted pyrroles 4. Accordingly, regioselective synthesis of substituted pyrroles has been achieved by merely choosing the catalyst.
Exploring the<i>in situ</i>Utilization of Cyclic Imine Intermediates Generated by Isocyanoacetate Cycloaddition: Convergent Assembly of<i>cis</i>-3a,8a-Hexahydropyrrolo[2,3-<i>b</i>]indole Scaffolds
AbstractUnder copper(I) or silver(I)/base cocatalysis conditions, transient 2H‐pyrroline intermediates generated by the cycloaddition of isocyanoacetates and olefins can be in situ subjected to further transformations. A strategically novel, convergent, mild, efficient, general and atom‐economic access to cis‐3a,8a‐hexahydropyrrolo[2,3‐b]indoles, which are core scaffolds in many biologically important natural products, has been developed based on this concept.magnified image
Chiral cooperativity: the nature of the diastereoselective and enantioselective step in the gold(I)-catalyzed aldol reaction utilizing chiral ferrocenylamine ligands