Supported p-Toluenesulfonic Acid as a Highly Robust and Eco-Friendly Isocyanide Scavenger
摘要:
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.
The coumarin compounds are an important class of biologically active molecules, which have attractive caught the attention of many organic and medicinal chemists, due to potential pharmaceutical implications and industrial applications. We herein report the one‐pot procedure for the efficient synthesis of coumarin derivatives using commercially available substrates via isocyanide‐based multicomponent condensation reactions. These compounds were evaluated for anti‐mycobacterium activity against Mycobacterium bovis (Bacillus Calmette–Guerin). The preliminary results indicated that all of the tested compounds showed relatively good activity against the test organism. The compounds 7e, 7l, and 7m showed high anti‐tuberculosis activity.
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.