Ammonia → (5R)-3-(3,4-Dihydro-4-methyl-3-oxo-2H-1,4-benzothiazin-7-yl)-2-oxo-5-oxazolidinecarboxamide

HRID 896154Notes

Reaction equation

HRID 896154 reaction equation
C[O:2][C:3]([C@@H:5]1[O:9][C:8](=[O:10])[N:7]([C:11]2[CH:22]=[CH:21][C:14]3[N:15]([CH3:20])[C:16](=[O:19])[CH2:17][S:18][C:13]=3[CH:12]=2)[CH2:6]1)=O.[NH3:23]>CO>[CH3:20][N:15]1[C:14]2[CH:21]=[CH:22][C:11]([N:7]3[CH2:6][C@H:5]([C:3]([NH2:23])=[O:2])[O:9][C:8]3=[O:10])=[CH:12][C:13]=2[S:18][CH2:17][C:16]1=[O:19]

Participants

4

Reactant 2

HCID 222AmmoniaHCID 68489755(5R)-3-(3,4-dihydro-4-methyl-3-oxo-2H-1,4-benzothiazin-7-yl)-2-oxo-5-oxazolidinecarboxylic acid methyl ester

Product 1

HCID 10125606(5R)-3-(3,4-Dihydro-4-methyl-3-oxo-2H-1,4-benzothiazin-7-yl)-2-oxo-5-oxazolidinecarboxamideYield 57%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent2×

Procedure

To a stirred suspension of the (5R)-3-(3,4-dihydro-4-methyl-3-oxo-2H-1,4-benzothiazin-7-yl)-2-oxo-5-oxazolidinecarboxylic acid methyl ester (Step 5, 200 mg, 0.6205 mmol) in MeOH (3 mL) is added a 2.0 M solution of ammonia in MeOH (2.0 mL). This mixture is stirred for 3 h at which time the reaction is concentrated under reduced pressure, washed with ethyl ether (6 mL) and filtered to give the title compound as a white solid (108 mg, 57%), 1H NMR (300 MHz, DMSO) δ 7.86 (s, 1H), 7.63 (d, 2H), 7.47 (dd, 1H), 7.27 (d, 1H), 5.01 (dd, 1H), 4.26 (t, 1H), 4.00 (dd, 1H), 3.52 (s, 2H), 3.32 (s, 3H); MS for C13H13N3O4SMS m/z 308.5 (M+H)+.

Workup

  1. concentrationis concentrated under reduced pressure
  2. washwashed with ethyl ether (6 mL)
  3. filtrationfiltered

Sources & evidence

ORD record
ord-914230435aa24e9ebbc28e442ba8051e
Source dataset
uspto-grants-2005_07
Patent number
US06919329B2

Reaction notes

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