On the Stereochemical Outcome of the Catalyzed and Uncatalyzed Cycloaddition Reaction between Activated Ketenes and Aldehydes to form cis- and trans-2-Oxetanones. An ab Initio Study

1. Lecea, B.
2. Arrieta, A.
3. Lopez, X.
4. Ugalde, J.M.
5. Cossío, F.P.