β-Lactam-Synthon-Interceded Metal/Acid-Free Diastereoselective Access to Highly Functionalized Oxazol-5-ones and DihydroimidazolesA.A. wishes to thank the University Grants Commission, New Delhi, India for financial support under grant no. ROMRP-NRCB-CHEM-2015-16-87198
Received: 22 May 2017
Accepted after revision: 11 July 2017
11 August 2017 (eFirst)
Facile diastereoselective access to functionalized oxazol-5-ones and dihydroimidazoles was accomplished through base-promoted intramolecular amidolysis and methoxide-assisted tandem intramolecular amidolysis/ring opening/intramolecular cyclization, respectively, of C-3-functionalized azetidin-2-ones.