Skip to main content
. Author manuscript; available in PMC: 2021 Jul 20.
Published in final edited form as: Nat Rev Chem. 2020 Jul 21;4:476–489. doi: 10.1038/s41570-020-0205-0

Figure 2.

Figure 2.

Cyclopropenone (CpX) derivatives exhibit unique reactivities. Analogs comprising oxygen or sulfur atoms react robustly with phosphines via ketene-ylide intermediates. Nitrogenous scaffolds react to form phosphonium bicycles.