Synlett 2015; 26(02): 238-242
DOI: 10.1055/s-0034-1379602
letter
© Georg Thieme Verlag Stuttgart · New York

Synthesis of Isoxazolidine-Fused Eight-Membered Heterocycles via an Intramolecular Nitrone–Alkene Cycloaddition

Tong Zhu
The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The College of Chemistry and The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. of China   Fax: +86(431)85188900   eMail: xbai@jlu.edu.cn
,
Jinbao Xiang
The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The College of Chemistry and The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. of China   Fax: +86(431)85188900   eMail: xbai@jlu.edu.cn
,
Zhenyu Liu
The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The College of Chemistry and The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. of China   Fax: +86(431)85188900   eMail: xbai@jlu.edu.cn
,
Qun Dang
The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The College of Chemistry and The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. of China   Fax: +86(431)85188900   eMail: xbai@jlu.edu.cn
,
Xu Bai*
The Center for Combinatorial Chemistry and Drug Discovery of Jilin University, The College of Chemistry and The School of Pharmaceutical Sciences, Jilin University, 1266 Fujin Road, Changchun, Jilin 130021, P. R. of China   Fax: +86(431)85188900   eMail: xbai@jlu.edu.cn
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Publikationsverlauf

Received: 17. September 2014

Accepted after revision: 27. Oktober 2014

Publikationsdatum:
17. Dezember 2014 (online)


Abstract

An intramolecular nitrone–alkene cycloaddition yielded novel tricyclic eight-membered ring with a cis-fused isoxazolidine in good to excellent yields under mild reaction conditions.

Supporting Information

 
  • References and Notes

  • 1 Huisgen R. Angew. Chem., Int. Ed. Engl. 1963; 2: 565
  • 6 During the preparation of this manuscript, we noticed a recent report on the construction of an eight-membered ring fused by isoxazolidines via intramolecular nitrone–alkene cycloaddition by Ichikawa’s group. Two cis-fused bicyclo[6.3.0]-type isoxazolidines were synthesized in 49% and 82% yields as the key intermediates in the synthesis of liponucleoside antibiotics. See: Tanino T, Yamaguchi M, Matsuda A, Ichikawa S. Eur. J. Org. Chem. 2014; 1836
  • 11 Xiang J, Zheng L, Chen F, Dang Q, Bai X. Org. Lett. 2007; 9: 765
  • 12 Long DD, Dahl R, Jolivet C, Marshall WJ, Termin AP. Tetrahedron­ Lett. 2002; 43: 4407
  • 13 CCDC-965318 (4b) and CCDC-974701 (4j) contain the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data_request/cif.
  • 14 Typical Experimental Procedure for the Synthesis of 4Compound 1a (225 mg, 0.50 mmol) in CH2Cl2 (20 mL) was treated with DIPEA (0.697 mL, 4.0 mmol) and DMSO (0.709 mL, 10.0 mmol). The reaction mixture was cooled to 0–2 °C, and SO3–pyridine (320 mg, 2.0 mmol) was added in two portions. The resulting solution was stirred for 2 h at 0–2 °C. The reaction mixture was then diluted with CH2Cl2 (20 mL), washed with 0.2 M aq KHSO4 (20 mL), H2O (20 mL), and brine (20 mL). Then it was dried over MgSO4, filtered, and diluted with CH2Cl2 to give a solution of crude aldehyde 2a in CH2Cl2 (50 mL). To the above solution was added NaOAc (49 mg, 0.60 mmol) and N-methylhydroxylamine hydrochloride (49 mg, 0.60 mmol). The mixture was stirred for 2 h at 25 °C, then washed with sat. aq Na2CO3 (25 mL), dried over MgSO4, and concentrated in vacuo. Purification by flash chromatography (PE–EtOAc, 5:1 to 1:2 v/v) afforded the desired product 4a (193 mg, 81% yield); mp 153–154 °C. 1H NMR (300 MHz, CDCl3): δ = 8.34 (s, 1 H), 7.44–7.42 (m, 2 H), 7.40–7.30 (m, 5 H), 7.00–6.96 (m, 2 H), 5.51 (d, 1 H, J = 13.5 Hz), 4.41 (t, 2 H, J = 7.5 Hz), 3.98 (t, 1 H, J = 8.4 Hz), 3.85 (s, 3 H), 3.51 (dd, 1 H, J = 15.6, 9.3 Hz), 3.46 (ddd, 1 H, J = 9.3, 8.4, 6.3 Hz), 3.21–3.16 (m, 4 H), 2.18 (br, 1 H), 2.11 (s, 3 H). 13C NMR (75 MHz, CDCl3): δ = 170.9, 169.6, 160.9, 158.2, 155.8, 137.4, 137.2, 128.92, 128.87, 128.2, 118.0, 116.1, 115.0, 70.4, 66.5, 55.4, 54.7, 49.4, 49.3, 42.9, 34.8. ESI-MS: m/z = 478.2 [M + H+].
  • 15 Buzas A, Merour J.-Y, Lavielle G. Heterocycles 1985; 23: 2561
  • 16 Chiacchio U, Rescifina A, Casuscelli F, Piperno A, Pisani V, Romeo R. Tetrahedron 1996; 52: 14311
  • 17 Houk KN, Sims J, Watts CR, Luskus LJ. J. Am. Chem. Soc. 1973; 95: 7301