Hydrochloric Acid → [(2-tert-Butyl-1,1-dioxido-3-oxo-5-phenyl-2,3-dihydroisothiazol-4-yl)amino]acetic acid

HRID 2421952Notes

Reaction equation

HRID 2421952 reaction equation
[C:1]([N:5]1[C:9](=[O:10])[C:8]([NH:11][CH2:12][C:13]([O:15]C)=[O:14])=[C:7]([C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[S:6]1(=[O:24])=[O:23])([CH3:4])([CH3:3])[CH3:2].CO.[Li+].[OH-].Cl>O1CCOCC1.O>[C:1]([N:5]1[C:9](=[O:10])[C:8]([NH:11][CH2:12][C:13]([OH:15])=[O:14])=[C:7]([C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[S:6]1(=[O:24])=[O:23])([CH3:4])([CH3:2])[CH3:3]

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 887MethanolHCID 3939Lithium HydroxideHCID 86625868HCID 86625868, compound

Product 1

HCID 67241765[(2-tert-Butyl-1,1-dioxido-3-oxo-5-phenyl-2,3-dihydroisothiazol-4-yl)amino]acetic acidYield 41.4%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Procedure

Methyl [(2-tert-butyl-1,1-dioxido-3-oxo-5-phenyl-2,3-dihydroisothiazol-4-yl)amino]acetate (1.28 g, 3.64 mmol) was dispersed in a mixture of dioxane (20 mL), MeOH (20 mL) and water (20 mL). Aqueous LiOH (1M, 0.218 g, 9.10 mmol) was added and the reaction mixture was stirred at rt for 2 h. Aqueous HCl was carefully added to the reaction mixture to give the pH˜1 and the resulting mixture was extracted with DCM. The organic phases were combined, dried over Na2SO4, filtered, evaporated and the crude residue was purified by preparative HPLC giving the title compound (0.51 g, 41%). 1H-NMR (CD3OD, 500 MHz): δ 7.52-7.48 (m, 2H), 7.46-7.42 (m, 3H), 5.41 (brs, 8H) 1.95 (s, 2H), 1.71 (s, 9H); 13C-NMR (CD3OD, 125 MHz): δ 178.4, 174.8, 160.8, 136.5, 132.8, 130.4, 129.5, 126.6, 107.4, 62.1, 48.3, 27.9, 22.9.

Workup

  1. customto give the pH˜1
  2. extractionthe resulting mixture was extracted with DCM
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. customevaporated
  6. customthe crude residue was purified by preparative HPLC

Sources & evidence

ORD record
ord-4001eec1932f4ee18f665a589582a9a9
Source dataset
uspto-grants-2011_06
Patent number
US07960380B2

Reaction notes

Loading…