Phosgene → (5R)-3-(8-Fluoro-1-methyl-2-oxo-1,2,3,4-tetrahydroquinolin-6-yl)-2-oxo-5-oxazolidinecarboxylic acid methyl ester

HRID 723915Notes

Reaction equation

HRID 723915 reaction equation
[C:1](Cl)(Cl)=[O:2].[CH3:5][O:6][C:7](=[O:25])[CH:8]([OH:24])[CH2:9][NH:10][C:11]1[CH:12]=[C:13]2[C:18](=[C:19]([F:21])[CH:20]=1)[N:17]([CH3:22])[C:16](=[O:23])[CH2:15][CH2:14]2.C(N(CC)CC)C>ClCCl>[CH3:5][O:6][C:7]([C@@H:8]1[O:24][C:1](=[O:2])[N:10]([C:11]2[CH:12]=[C:13]3[C:18](=[C:19]([F:21])[CH:20]=2)[N:17]([CH3:22])[C:16](=[O:23])[CH2:15][CH2:14]3)[CH2:9]1)=[O:25]

Participants

5

Reactant 3

HCID 6371PhosgeneHCID 8471TriethylamineHCID 684917263-(8-Fluoro-1-methyl-2-oxo-1,2,3,4-tetrahydroquinolin-6-ylamino)-2-hydroxypropionic acid methyl ester

Product 1

HCID 68491736(5R)-3-(8-Fluoro-1-methyl-2-oxo-1,2,3,4-tetrahydroquinolin-6-yl)-2-oxo-5-oxazolidinecarboxylic acid methyl esterYield 83%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Phosgene (20% solution in toluene, 4.07 ml, 7.69 mmol) is added dropwise at 0° C. to 3-(8-fluoro-1-methyl-2-oxo-1,2,3,4-tetrahydroquinolin-6-ylamino)-2-hydroxypropionic acid methyl ester (Step 4, 1.81 g, 6.41 mmol) and triethylamine (2.23 ml, 16.0 mmol) in dichloromethane (25 ml). The mixture is allowed to warm to room temperature and stirred for an additional hour. The reaction is washed with 2N aqueous hydrochloric acid and saline, dried (MgSO4) and evaporated. The residue is purified by flash column chromatography (50% ethyl acetate/hexane) to give the title compound as a white solid (1.71 g, 83%); MS (m/z): [M+H]+=323.

Workup

  1. washThe reaction is washed with 2N aqueous hydrochloric acid and saline
  2. dry with materialdried (MgSO4)
  3. customevaporated
  4. customThe residue is purified by flash column chromatography (50% ethyl acetate/hexane)

Sources & evidence

ORD record
ord-ebeaedab07aa457aa4b077046b61bc3d
Source dataset
uspto-grants-2006_11
Patent number
US07141588B2

Reaction notes

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