Synthesis of Highly Substituted 1, 2‐Diazetidin‐3‐ones, Small‐Ring Scaffolds for Drug Discovery. Issue 33 (15th May 2018)

• Record Type: Journal Article
• Authors: Santos, Marilia S.; Nortcliffe, Andrew; Lewis, William; Bradshaw, Tracey D.; Moody, Christopher J.
• Is Part Of: Chemistry. Volume 24:Issue 33(2018)
• Page Start: 8325
• Page End: 8330
• Publication Date: 2018-05-15
• Subjects: 4-membered rings -- carbene insertion -- drug discovery -- heterocycles -- lead-oriented synthesis; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201801309
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: 1, 2‐Diazetidin‐3‐ones are readily accessible, small ring scaffolds that upon functionalization have the potential to produce diverse 3‐dimensional structures for drug discovery. Thus, treatment of diazo hydrazides, obtained from simple hydrazides and malonyl half ester derivatives, followed by diazo transfer, with catalytic amounts of rhodium(II) acetate dimer results in intramolecular carbenoid N−H insertion to give 1, 2‐diazetidin‐3‐ones. Although subsequent functionalization reactions could be hampered by the lability of the 4‐membered ring, a wide range of new derivatives was available by deprotection at N‐1, and subsequent amide or urea formation. The structures of four four‐membered rings was confirmed by X‐ray crystallography; the compounds showed modest growth inhibitory activity in mammary carcinoma cells. Abstract : Small rings to populate chemical space : 1, 2‐Diazetidin‐3‐ones, readily obtained through intramolecular rhodium carbene N−H insertion, are useful scaffolds for drug discovery.