Hydrochloric Acid → 3-(Benzyloxy)-9-(2-(methylthio)ethyl)-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxylic acid

HRID 1372212

Reaction equation

HRID 1372212 reaction equation
[CH2:1]([O:8][C:9]1[C:18](=[O:19])[N:17]2[C:12]([CH:13]([CH2:20][CH2:21][S:22][CH3:23])[O:14][CH2:15][CH2:16]2)=[N:11][C:10]=1[C:24]([O:26]CC)=[O:25])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[OH-].[Li+].Cl>O1CCCC1.O>[CH2:1]([O:8][C:9]1[C:18](=[O:19])[N:17]2[C:12]([CH:13]([CH2:20][CH2:21][S:22][CH3:23])[O:14][CH2:15][CH2:16]2)=[N:11][C:10]=1[C:24]([OH:26])=[O:25])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 3939Lithium HydroxideHCID 21069951Ethyl 3-(benzyloxy)-9-(2-(methylthio)ethyl)-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxylate

Product 1

HCID 210698573-(Benzyloxy)-9-(2-(methylthio)ethyl)-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxylic acidYield 108.9%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a stirred solution of intermediate 21, ethyl 3-(benzyloxy)-9-(2-(methylthio)ethyl)-4-oxo-4,6,7,9-tetrahydropyrimido[2,1-c][1,4]oxazine-2-carboxylate (97 mg, 0.2 mmol) in 3 mL tetrahydrofuran was added lithium hydroxide (15 mg, 0.6 mmol) in 3 mL water. After 20 min the reaction mixture was acidified with 1N HCl and extracted with CH2Cl2. The extract was dried over MgSO4, filtered and concentrated to give 82 mg of the title compound (88% yield). LC/MS m/e 377.

Workup

  1. extractionextracted with CH2Cl2
  2. dry with materialThe extract was dried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-924fd1186a904f1da9101d754d24d40b
Source dataset
uspto-grants-2007_01
Patent number
US07157447B2

Linked notes

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