A versatile and highly efficient three‐step, one‐pot, enzyme‐promoted Passerini tandem reaction has been developed. The chemoenzymatic sequence involved simultaneous enzyme catalyzed hydrolysis, subsequent Passerini reaction, and enzymatic kinetic resolution of the Passerini product. This methodology combines the diversity delivered by multicomponent reactions with the selectivity of biocatalysts,
Supported <i>p</i>-Toluenesulfonic Acid as a Highly Robust and Eco-Friendly Isocyanide Scavenger
作者:Jhonny Azuaje、Alberto Coelho、Abdelaziz El Maatougui、José Manuel Blanco、Eddy Sotelo
DOI:10.1021/co100035z
日期:2011.1.10
We document here the use of polymer-supported p-toluenesulfonic acid as a highly effective, robust, economical and eco-friendly isocyanide scavenger. The herein described strategy; circumvent the intense and repulsive odor of volatile isocyanides, enabling simplified and odorless workup and purifications. The usefulness of the new scavengers has been validated in a set of diverse isocyanide-based organic transformations and this approach is also amenable to parallel synthesis techniques.