Synlett 2023; 34(17): 2022-2028
DOI: 10.1055/a-2107-5567
letter
Special Issue Thieme Chemistry Journals Awardees 2023

Catalyst-Free, Multicomponent Reaction of Iodonium Ylides, Nitrosoarenes, and Olefins for the Synthesis of Isoxazolidine Derivatives

Yan-Rui Zhao
a   Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, P. R. of China
,
Lei Li
b   Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252000, P. R. of China
,
Jun Xuan
a   Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, College of Chemistry & Chemical Engineering, Anhui University, Hefei, Anhui 230601, P. R. of China
› Institutsangaben
Financial support for this work was provided by the National Natural Science Foundation of China (nos. 21971001, 22101002, and 21702001).


Abstract

A general and efficient three-component protocol for the synthesis of isoxazolidines has been developed. A range of nitrosoarenes, olefins, as well as iodonium ylides can be subjected to this reaction to generate the N-aryl isoxazolidines derivatives with moderate to excellent yields. In addition, we demonstrate that this approach employs the 1,3-dipolar cycloaddition of nitrones generated in situ from iodonium ylides and nitroso compounds, with olefins in the absence of any catalysts and additives.

Supporting Information



Publikationsverlauf

Eingereicht: 04. Mai 2023

Angenommen nach Revision: 07. Juni 2023

Accepted Manuscript online:
07. Juni 2023

Artikel online veröffentlicht:
13. Juli 2023

© 2023 . Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany

 
  • References and Notes

  • 7 Hartmann M, Li Y, Mìck-Lichtenfeld C, Studer A. Chem. Eur. J. 2016; 22: 3485
  • 9 Sen S, Barman D, Khan H, Das R, Maiti D. J. Org. Chem. 2022; 87: 12164
  • 15 Zhai P.-G, Li W.-H, Lin J.-Y, Li X, Wei W.-L, Chen W.-W. J. Org. Chem. 2021; 86: 17710
  • 17 Li X, Zhai P.-G, Fang Y.-S, Li W.-H, Chang H.-H, Gao W.-C. Org. Chem. Front. 2021; 8: 988
  • 18 Li X, Zheng L.-J, Gong X.-L, Chang H.-H, Gao W.-C, Wei W.-L. J. Org. Chem. 2021; 86: 1096
  • 20 Zhao Y.-R, Li L, Xu G.-Y, Xuan J. Adv. Synth. Catal. 2022; 364: 506
  • 22 General Procedure To a sealed tube equipped with a magnetic stir bar were added 1a′ (0.20 mmol, 2.0 equiv), 2a (0.10 mmol, 10.7 mg, 1.0 equiv), 3a (0.20 mmol, 20.8 mg, 2.0 equiv), and dry DCM (1.0 mL). Then, the temperature of metal sand bath was set to 50 ℃, and the closed reaction system was stirred for 18 h. The solvent was removed by vacuum, and the crude product was purified by flash chromatography on silica gel silica: 200–300; eluant: petroleum ether/ethyl acetate (10:1) to provide pure product 4 as a yellow solid in 99% yield (33.8 mg). Dimethyl 2-(4-Hexylphenyl)-5-phenylisoxazolidine-3,3-dicarboxylate (5) 1H NMR (400 MHz, CDCl3, 300 K): δ = 7.54 (d, J = 6.9 Hz, 2 H), 7.42–7.33 (m, 3 H), 7.29–7.26 (m, 3 H), 7.09–7.06 (m, 2 H), 5.32 (dd, J = 9.3, 6.4 Hz, 1 H), 3.73 (s, 3 H), 3.48 (s, 3 H), 3.25–3.11 (m, 2 H), 2.55 (d, J = 7.5 Hz, 2 H), 1.27 (q, J = 5.4, 4.3 Hz, 8 H), 0.86 (d, J = 6.9 Hz, 3 H) ppm. 13C NMR (100 MHz, CDCl3, 300 K): δ = 169.0, 168.3, 144.7, 139.0, 137.5, 128.6, 128.2, 127.0, 118.7, 79.0, 78.8, 78.8, 53.0, 52.7, 47.6, 35.3, 31.7, 31.5, 28.8, 22.6, 14.1 ppm. HRMS (APCI): m/z [M + H]+ calcd for C25H32NO5: 426.2280; found: 426.2290. Dimethyl 5-Phenyl-2-(pyridin-2-yl)isoxazolidine-3,3-dicarboxylate (17) 1H NMR (400 MHz, CDCl3, 300 K): δ = 8.18–8.15 (m, 1 H), 7.61–7.57 (m, 1 H), 7.45–7.33 (m, 5 H), 7.15 (d, J = 8.4 Hz, 1 H), 6.83–6.80 (m, 1 H), 5.34 (dd, J = 9.1, 6.4 Hz, 1 H), 3.79 (d, J = 8.2 Hz, 6 H), 3.37 (dd, J = 12.8, 6.4 Hz, 1 H), 3.05 (dd, J = 12.8, 9.2 Hz, 1 H) ppm. 13C NMR (100 MHz, CDCl3, 300 K): δ = 169.4, 168.8, 158.5, 146.7, 137.8, 137.0, 128.7, 128.7, 126.8, 116.9, 109.9, 80.4, 75.4, 53.3, 53.2, 47.7 ppm. HRMS (APCI): m/z [M + H]+ calcd for C18H19N2O5: 343.1249; found: 343.1272. Dimethyl 5-Benzyl-2-phenylisoxazolidine-3,3-dicarboxylate (27) 1H NMR (400 MHz, CDCl3, 300 K): δ = 7.34–7.23 (m, 9 H), 7.01 (q, J = 4.4 Hz, 1 H), 4.60–4.53 (m, 1 H), 3.62 (s, 3 H), 3.55 (s, 3 H), 3.21 (dd, J = 13.8, 6.7 Hz, 1 H), 2.96–2.90 (m, 2 H), 2.81 (dd, J = 12.7, 8.7 Hz, 1 H) ppm. 13C NMR (100 MHz, CDCl3, 300 K): δ = 168.8, 168.6, 147.1, 137.3, 129.2, 128.5, 128.3, 126.7, 123.7, 117.8, 78.4, 77.8, 52.9, 52.8, 45.4, 38.9 ppm. HRMS (APCI): m/z [M + H]+ calcd for C20H22NO5: 356.1498; found: 356.1497. Dimethyl 5-(2-Oxopyrrolidin-1-yl)-2-phenylisoxazolidine-3,3-dicarboxylate (30) 1H NMR (400 MHz, CDCl3, 300 K): δ = 7.24 (d, J = 4.1 Hz, 4 H), 7.04–6.97 (m, 1 H), 4.45–4.38 (m, 1 H), 3.69 (s, 3 H), 3.51 (s, 3 H), 2.97 (dd, J = 12.5, 5.6 Hz, 1 H), 2.68 (dd, J = 12.3, 9.6 Hz, 1 H), 1.86–1.64 (m, 6 H), 1.53 (dd, J = 13.1, 8.0 Hz, 2 H), 1.28–1.17 (m, 3 H), 1.02–0.93 (m, 2 H) ppm. 13C NMR (100 MHz, CDCl3, 300 K): δ = 169.2, 168.6, 147.3, 128.3, 123.4, 117.6, 78.4, 75.5, 52.9, 52.7, 46.5, 40.2, 35.3, 33.6, 33.2, 26.4, 26.2, 26.1 ppm. HRMS (APCI): m/z [M + H]+ calcd for C20H28NO5: 362.1967; found: 362.1966. Dimethyl 5-Formyl-5-methyl-2-phenylisoxazolidine-3,3-dicarboxylate (37) 1H NMR (400 MHz, CDCl3, 300 K): δ = 9.68 (s, 1 H), 7.37 (d, J = 8.3 Hz, 2 H), 7.29 (d, J = 7.6 Hz, 2 H), 7.12 (t, J = 7.3 Hz, 1 H), 3.80 (s, 3 H), 3.32 (s, 3 H), 3.17 (d, J = 13.0 Hz, 1 H), 3.00 (d, J = 13.0 Hz, 1 H), 1.49 (s, 3 H) ppm. 13C NMR (100 MHz, CDCl3, 300 K): δ = 203.1, 168.4, 167.0, 145.7, 128.3, 125.3, 119.6, 84.0, 77.9, 53.1, 52.5, 45.8, 17.4 ppm. HRMS (APCI): m/z [M + H]+ calcd for C15H18NO6: 308.1134; found: 308.1135. Methyl 3-Acetyl-2,5-diphenylisoxazolidine-3-carboxylate (45) 1H NMR (400 MHz, CDCl3, 300 K): δ = 7.48–7.43 (m, 2 H), 7.42–7.34 (m, 3 H), 7.31–7.26 (m, 2 H), 7.20 (dd, J = 8.8, 1.1 Hz, 2 H), 7.05–7.00 (m, 1 H), 5.39 (dd, J = 8.9, 6.4 Hz, 1 H), 3.72 (s, 3 H), 3.41 (dd, J = 12.9, 6.4 Hz, 1 H), 2.86 (dd, J = 12.9, 9.0 Hz, 1 H), 2.15 (s, 3 H) ppm. 13C NMR (100 MHz, CDCl3, 300 K): δ = 203.5, 168.8, 146.8, 137.3, 128.8, 128.7, 128.6, 126.5, 123.3, 116.7, 83.5, 79.1, 53.0, 46.5, 26.7 ppm. HRMS (APCI): m/z [M + H]+ calcd for C19H20NO4: 326.1392; found: 326.1390. For the Synthesis of 11, 13, 39, and 40 To a sealed tube equipped with a magnetic stir bar were added 1a′ (0.20 mmol, 2.0 equiv), 2 (0.10 mmol, 1.0 equiv), 3 (0.20 mmol, 2.0 equiv), and dry DCM (1.0 mL). Then, the temperature of metal sand bath was set to 70 ℃, and the closed reaction system was stirred for 18 h. The solvent was removed by vacuum, and the crude product was purified by flash chromatography on silica gel silica: 200–300; eluant: petroleum ether/ethyl acetate (10:1) to provide pure product. Dimethyl 2-Phenyltetrahydrofuro[3,2-d]isoxazole-3,3(2H)-dicarboxylate (40) 1H NMR (400 MHz, CDCl3, 300 K): δ = 7.41 (s, 2 H), 7.28–7.24 (m, 3 H), 7.12 (t, J = 7.3 Hz, 1 H), 5.99 (d, J = 5.3 Hz, 1 H), 4.29–4.22 (m, 1 H), 4.03–3.99 (m, 1 H), 3.86 (dd, J = 6.4, 3.1 Hz, 1 H), 3.83 (s, 3 H), 3.32 (s, 3 H), 2.07 (s, 1 H), 1.92–1.83 (m, 1 H) ppm. 13C NMR (100 MHz, CDCl3, 300 K): δ = 167.1, 166.2, 146.0, 128.1, 125.8, 121.1, 104.4, 82.7, 69.1, 54.2, 52.8, 52.1, 29.1 ppm. HRMS (APCI): m/z [M + H]+ calcd for C15H18NO6: 308.1134; found: 308.1134.