4-(Morpholin-4-yl)benzoic acid → 6-(4-Morpholinophenyl)-3-(3,4,5-trimethoxyphenyl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole

HRID 15028

Reaction equation

HRID 15028 reaction equation
[O:1]1[CH2:6][CH2:5][N:4]([C:7]2[CH:15]=[CH:14][C:10]([C:11](O)=O)=[CH:9][CH:8]=2)[CH2:3][CH2:2]1.[NH2:16][N:17]1[C:21]([C:22]2[CH:27]=[C:26]([O:28][CH3:29])[C:25]([O:30][CH3:31])=[C:24]([O:32][CH3:33])[CH:23]=2)=[N:20][N:19]=[C:18]1[SH:34]>O=P(Cl)(Cl)Cl>[O:1]1[CH2:6][CH2:5][N:4]([C:7]2[CH:15]=[CH:14][C:10]([C:11]3[S:34][C:18]4=[N:19][N:20]=[C:21]([C:22]5[CH:27]=[C:26]([O:28][CH3:29])[C:25]([O:30][CH3:31])=[C:24]([O:32][CH3:33])[CH:23]=5)[N:17]4[N:16]=3)=[CH:9][CH:8]=2)[CH2:3][CH2:2]1

Participants

4

Reactant 2

HCID 3452784-(Morpholin-4-yl)benzoic acidHCID 178488244HCID 178488244, compound

Product 1

HCID 249552286-(4-Morpholinophenyl)-3-(3,4,5-trimethoxyphenyl)-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazoleYield 24.4%

Reagents, catalysts & solvents 1

HCID 24813Phosphorus oxychlorideSolvent

Procedure

A mixture of 4-morpholinobenzoic acid (86 mg, 0.42 mmol) and 4-amino-3-mercapto-5-(3,4,5-trimethoxyphenyl)-4H-1,2,4-triazole (102 mg, 0.36 mmol) was refluxed in POCl3 (5 mL) for 2 h. The reaction mixture was cooled to room temperature and excess POCl3 was removed under vacuum. The residue was dissolved in ethyl acetate and washed with saturated NaHCO3. The organic layer was dried over anhydrous Na2SO4, filtered and concentrated. The crude product was purified by chromatography (80% ethyl acetate/hexane; 1 mL methanol/100 mL of solvent) to give the title compound as a yellow solid (40 mg, 0.088 mmol, 24%). 1H NMR (CDCl3): 7.78 (m, 2H), 7.73 (s, 2H), 6.98 (m, 2H), 4.00 (s, 6H), 3.94 (s, 3H), 3.89 (m, 4H), 3.41 (m, 4H).

Workup

  1. customexcess POCl3 was removed under vacuum
  2. dissolutionThe residue was dissolved in ethyl acetate
  3. washwashed with saturated NaHCO3
  4. dry with materialThe organic layer was dried over anhydrous Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe crude product was purified by chromatography (80% ethyl acetate/hexane; 1 mL methanol/100 mL of solvent)

Sources & evidence

ORD record
ord-1a99ddf1b32949a193135c68e1c70694
Source dataset
uspto-grants-2010_06
Patent number
US07732468B2

Linked notes

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