title: Highly stereoselective double (R)-phenylglycinol-induced cyclocondensation reactions of symmetric aryl bis(oxoacids).
abstract: The double cyclocondensation of symmetric pyridyl bis(oxoacids) 2b and 3b with (R)-phenylglycinol stereoselectively gave access to bis-phenylglycinol-derived oxazolopyrrolidine 9 and oxazolopiperidone 10, respectively. Application of the stereocontrolled cyclocondensation reaction to phenyl bis-γ-oxoacid 4b provided 11, which was converted to the corresponding enantiopure di(pyrrolidinyl)benzene 22. The absolute configuration of the new stereogenic centers generated in the key cyclocondenstion step was unambiguously established by X-ray crystallographic analysis.
authors.affiliation: Laboratory of Organic Chemistry, Faculty of Pharmacy, and Institute of Biomedicine (IBUB), 08028-Barcelona, Spain. amat@ub.edu
authors.forename: Mercedes
authors.initials: M
authors.lastname: Amat
authors.forename: Carlos
authors.initials: C
authors.lastname: Arróniz
authors.forename: Elies
authors.initials: E
authors.lastname: Molins
authors.forename: Carmen
authors.initials: C
authors.lastname: Escolano
authors.forename: Joan
authors.initials: J
authors.lastname: Bosch
mesh_terms: D000143:Acids / Q000737:chemistry*; D018360:Crystallography, X-Ray; D003500:Cyclization; D004983:Ethanolamines; D005998:Glycine / Q000031:analogs & derivatives* / Q000737:chemistry; D008958:Models, Molecular; D015394:Molecular Structure; D013237:Stereoisomerism
chemical_list: D000143:Acids; D004983:Ethanolamines; C005332:N-phenylethanolamine; D005998:Glycine