Water → HCID 59237154, compound

HRID 2380791Notes

Reaction equation

HRID 2380791 reaction equation
[OH-].[NH4+:2].[CH3:3][N:4]([N:6]=[N:7][C:8]1[CH:12]=[C:11]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[S:10][C:9]=1[C:19]([O:21]C)=O)[CH3:5].O>C1COCC1>[CH3:3][N:4]([N:6]=[N:7][C:8]1[CH:12]=[C:11]([C:13]2[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=2)[S:10][C:9]=1[C:19]([NH2:2])=[O:21])[CH3:5]

Participants

5

Reactant 3

HCID 962WaterHCID 14923Ammonium HydroxideHCID 67183833HCID 67183833, compound

Product 1

HCID 59237154HCID 59237154, compoundYield 8%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To an ice cold (0-5° C.) solution of ammonium hydroxide (80 mL) was added a solution of methyl 3-[(dimethylamino)diazenyl]-5-phenylthiophene-2-carboxylate (2.2 g) in THF (15 mL) for 5 min followed by catalytic amount of PEG-400 and the mixture was stirred at rt for 36 h. The solution was poured into ice cooled water and extracted with chloroform. The combined organic layer was washed with water, brine and dried over sodium sulfate. The solution was filtered and evaporated the solvent. The residue was chromatographed over silica gel column using chloroform-methanol (94:6) as eluents to give the product. The crude product was recrystallized from chloroform-hexane to give the product as a yellow color solid (170 mg, 8%), mp 220-222° C. IR (neat) νmax, 3343, 2922, 2855, 1642, 1595, 1221, 1023, 880, 841 cm−1; 1H NMR (400 MHz, CDCl3): δ 8.30 (1H, br s), 7.64-7.66 (2H, m), 7.53 (1H, s), 7.30-7.41 (3H, m), 6.34 (1H, br s), 3.59 (3H, s), 3.20 (3H, s); 13C NMR (100 MHz, CDCl3): δ 164.7, 151.1, 146.7, 133.9, 128.9, 128.5, 125.8, 125.4, 114.7, 43.6, 36.5; LC-MS (positive ion mode): m/z 297 (M+Na)+.

Workup

  1. additionThe solution was poured into ice
  2. extractionextracted with chloroform
  3. washThe combined organic layer was washed with water, brine
  4. dry with materialdried over sodium sulfate
  5. filtrationThe solution was filtered
  6. customevaporated the solvent
  7. customThe residue was chromatographed over silica gel column
  8. customto give the product
  9. customThe crude product was recrystallized from chloroform-hexane

Sources & evidence

ORD record
ord-950cbcd4e45e4ab698468a7509397897
Source dataset
uspto-grants-2012_09
Patent number
US08258119B2

Reaction notes

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