Chlorosuccinimide → HCID 68706883, compound

HRID 2250292Notes

Reaction equation

HRID 2250292 reaction equation
[CH3:1][O:2][C:3](=[O:27])[C@H:4]([NH:16][C:17]([O:19][CH2:20][C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1)=[O:18])[CH2:5][C:6]1[CH:15]=[CH:14][C:9]2[NH:10][C:11](=[O:13])[O:12][C:8]=2[CH:7]=1.[Cl:28]N1C(=O)CCC1=O>ClC(Cl)C>[CH3:1][O:2][C:3](=[O:27])[C@H:4]([NH:16][C:17]([O:19][CH2:20][C:21]1[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=1)=[O:18])[CH2:5][C:6]1[CH:15]=[C:14]([Cl:28])[C:9]2[NH:10][C:11](=[O:13])[O:12][C:8]=2[CH:7]=1.[CH3:1][O:2][C:3](=[O:27])[CH:4]([NH:16][C:17]([O:19][CH2:20][C:21]1[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=1)=[O:18])[CH2:5][C:6]1[C:15]([Cl:28])=[CH:14][C:9]2[NH:10][C:11](=[O:13])[O:12][C:8]=2[CH:7]=1

Participants

5

Reactant 2

HCID 31398ChlorosuccinimideHCID 25136281HCID 25136281, compound

Product 2

HCID 25136130HCID 25136130, compoundYield 9.8%HCID 68706883HCID 68706883, compoundYield 19%

Reagents, catalysts & solvents 1

HCID 63651,1-DichloroethaneSolvent

Conditions

Temperature
90 °C

Procedure

A mixture of (R)-2-benzyloxycarbonylamino-3-(2-oxo-2,3-dihydro-benzooxazol-6-yl)-propionic acid methyl ester (373 mg, 1.01 mmol), N-chlorosuccinimide (168 mg, 1.26 mmol), silica gel (EM Scientific, 230-400 mesh, 3.73 g) in dichloroethane (20 mL) was heated at 90° C. for 16 h. After cooling down to room temperature, the solvents were removed in vacuo. The residue was subjected to silica gel chromatography using ethyl acetate/hexanes (1:2) as eluent to afford the title compound (40 mg, 9.8%), also 2-benzyloxycarbonylamino-3-(5-chloro-2-oxo-2,3-dihydro-benzooxazol-6-yl)-propionic acid methyl ester (78 mg, 19%). The structure was confirmed by 2D NMR and by comparison with that of 2-benzyloxycarbonylamino-3-(5-chloro-2-oxo-2,3-dihydro-benzooxazol-6-yl)-propionic acid methyl ester prepared by the reaction shown below. 1H-NMR (CD3COCD3, 500 MHz) δ 7.37-7.27 (m, 5H), 7.18 (d, J=1.0 Hz, 1H), 7.16 (s, 1H), 6.76 (d, J=8.5 Hz, 1H), 5.06 (d, J=12.5 Hz, 1H), 5.02 (d, J=12.5 Hz, 1H), 4.55-4.51 (m, 1H), 3.72 (s, 3H), 3.26 (dd, J=14.0, 5.0 Hz, 1H), 3.04 (dd, J=14.0, 9.5 Hz, 1H); 13C-NMR (CD3COCD3, 125 MHz) δ 172.2, 156.4, 154.0, 144.8, 137.6, 133.3, 128.7, 128.2, 128.0, 127.9, 125.0, 66.3, 55.9, 52.0, 37.3; Mass spec. 405 (MH+).

Workup

  1. temperatureAfter cooling down to room temperature
  2. customthe solvents were removed in vacuo

Sources & evidence

ORD record
ord-4b7033e9e86f45bfb0b4b1dc1a18ebac
Source dataset
uspto-grants-2008_01
Patent number
US07314883B2

Reaction notes

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