Robuta

https://pmc.ncbi.nlm.nih.gov/articles/PMC10445484/ Oxetane-, Azetidine- and Bicyclopentane-Bearing N-Heterocycles from Ynones: Scaffold... Three-fold scaffold diversification is achieved via ruthenium-catalyzed oxidative alkynylation of commercially available primary alcohols to form... oxetaneazetidinebicyclopentanebearingheterocycles