Synthesis 2008(6): 971-977  
DOI: 10.1055/s-2008-1032196
PAPER
© Georg Thieme Verlag Stuttgart · New York

Synthesis of Polyhydroxylated Pyrrolidines and Aziridinopyrrolidines from [4π+2π] Cycloadducts of Cyclopentadiene and Imines/2H-Azirines

José Enrique Rodriguez-Borges*a, Maria Luísa C. Valea, Fabio Rizzo Aguiara, Maria José Alves*b, Xerardo García-Mera*c
a CIQ, Departamento de Química, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, 687, 4169-007 Porto, Portugal
b Departamento de Química, Universidade do Minho, Campus de Gualtar, 4710-057 Braga, Portugal
c Departamento de Química Orgánica, Facultade de Farmacia, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
Fax: +34(981)594912; e-Mail: qoxgmera@usc.es;
Further Information

Publication History

Received 12 November 2007
Publication Date:
28 February 2008 (online)

Abstract

The synthesis of 2-functionalized 3,5-bis(hydroxymethyl)pyrrolidines from readily available polycyclic Diels-Alder adducts by a reaction sequence involving three steps is described. The same methodology has been applied to obtain the aziridine counterparts from the corresponding methyl 2-azatricyclo[3.2.1.02,4]oct-6-ene-4-carboxylates. The key steps in the synthetic strategy are dihydroxylation with osmium tetroxide/N-methylmorpholine N-oxide, oxidative cleavage with sodium periodate, and reduction using sodium borohydride or lithium aluminum hydride; overall yields ranged from 40-60%.

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The crystallographic data (excluding structure factors) for structure of 5b have been deposited at the Cambridge Crystallographic Data Centre as supplementary publication number CCDC 240700. Empirical formula: C30H38N2O2. Formula weight: 458.62. Crystal size: 0.38 × 0.37 × 0.28 mm3. Crystal system: orthorhombic. Space group: P212121. Unit cell dimensions: a = 10.912 (3) Å, b = 12.029 (3) Å, c = 19.685 (3) Å, α = 90°, β = 90°, γ = 90°. D calc = 1.179 mg/m3. F(000) = 992. R1 = 0.0710, wR2 0 0.0772. Copies of the data can be obtained free of charge on application to CCDC, 12 Union Road, Cambridge, CB2 1EZ, UK [fax: +44 (1223)336033 or e-mail: deposit@ccdc.cam.ac.uk].