Abstract
Being an abundant, easily available, and renewable one-carbon source, carbon dioxide has received much attention in organic synthesis. However, carbon dioxide is a thermodynamically inert molecule that is hard to incorporate into useful chemicals. Nevertheless, various elegant methods have been developed for the incorporation of carbon dioxide in a number of heterocycles. In this review, we summarize and update the recent advances in n-dig-cyclization of alkynes involving the fixation of CO2, including the 5-dig- and 6-dig-cyclization of alkynes.
1 Introduction
2 The 5-dig-Cyclization of Alkynes
3 The 6-dig-Cyclization of Alkynes
4 Conclusion
Key words
alkynes - CO
2 fixation - cyclization - rearrangement - multicomponent reaction
