CO2 at atmospheric pressure is used in two Pd-catalyzed multicomponent reactions to produce functionalized 5-methylene-1,3-oxazolidin-2-ones from propargylamines and aryl halides.

The reaction of indoles and stabilized cyclopropyl alkynes under gold‐ and/or gold & Brønsted acid‐catalysis provided access to highly substituted tetrahydrocarbazoles. A mechanistic study revealed the complex mechanism underlying these processes and the opportunistic cooperation of Lewis and Brønsted acid‐catalysts towards the formation of complex molecular scaffolds.

No abstract

Starting from propargylamines and aryl halides an efficient procedure for the incorporation of atmospheric CO2 is developed which leads to a stereocontrolled, atom‐economic and high‐yielding synthesis of previously inaccessible heterocycles.