3-Ethyl-5-phenyloxazolidin-2-one. 1H NMR (400 MHz,
CDCl3): d 7.27–7.43 (m, 5H, Ph–H), 5.49 (t, 1H, J = 8.0 Hz,
Ph–CH), 3.93 (t, 1H, J = 8.0 Hz, CH–CH2), 3.29–3.46 (m, 3H,
CH–CH2 and -CH2CH3), 1.18 (t, 3H, J = 8.0 Hz, -CH2CH3).
13C NMR (100 MHz, CDCl3): d 157.80, 138.97, 128.90, 125.64,
74.43, 51.73, 39.04, 12.72. ESI-MS calcd. for C11H13NO2, 191.1,
found 192.1 (M+H)+, 214.1 (M+Na)+, 405.2 (2 M + Na)+. FT-
IR v(C O): 1747 cm-1 (Film).
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3-Ethyl-4-phenyloxazolidin-2-one. 1H NMR (400 MHz,
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Ph–CH), 4.62 (t, 1H, J = 8.0 Hz, CH–CH2), 4.10 (t, 1H, J =
8.0 Hz, CH–CH2), 3.48–3.57 (m, 1H, -CH2CH3), 2.80–2.89 (m,
1H, -CH2CH3), 1.05 (t, 3H, J = 8.0 Hz, -CH2CH3). 13C NMR
(100 MHz, CDCl3): d 158.42, 137.89, 129.45, 129.24, 127.36,
70.01, 59.53, 37.04, 12.19. ESI-MS calcd. for C11H13NO2, 191.1,
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NMR
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1H, J = 8.0 Hz, Ph–CH), 3.88 (t, 1H, J = 8.0 Hz, CH–N–
CH2), 3.74 (m, 1H, CH–N–CH2), 3.39 (t, 1H, J = 8.0 Hz,
CH–N–CH2), 1.0–1.9 (m, 10 H, cHex-H). 13C NMR (100 MHz,
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Acknowledgements
This work is supported by the National Natural Science Founda-
tion of China (NSFC, Grant 21004007), the Foundation for the
Author of National Excellent Doctoral Dissertation of China
(No. FANEDD, 200759), and National Basic Research Program
of China (973 Program: 2009CB825300). X.-B. Lu gratefully
acknowledges the Outstanding Young Scientist Foundation of
NSFC (Grant 20625414).
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650 | Green Chem., 2011, 13, 644–650
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