Sodium borohydride → (3-(4-Chloro-2-methoxyphenyl)-1,2,4-thiadiazol-5-yl)methanol

HRID 453113Notes

Reaction equation

HRID 453113 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:12]=[C:11]([C:13](OCC)=[O:14])[S:10][N:9]=2)=[C:4]([O:18][CH3:19])[CH:3]=1.[BH4-].[Na+]>CCO>[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[N:12]=[C:11]([CH2:13][OH:14])[S:10][N:9]=2)=[C:4]([O:18][CH3:19])[CH:3]=1

Participants

4

Reactant 2

HCID 4311764Sodium borohydrideHCID 59549519Ethyl 3-(4-chloro-2-methoxyphenyl)-1,2,4-thiadiazole-5-carboxylate

Product 1

HCID 59549528(3-(4-Chloro-2-methoxyphenyl)-1,2,4-thiadiazol-5-yl)methanolYield 92%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

To a solution of ethyl 3-(4-chloro-2-methoxyphenyl)-1,2,4-thiadiazole-5-carboxylate (0.31 g, 1.04 mmol) in EtOH (15 ml) was added sodium borohydride (0.098 g, 2.59 mmol) portion wise. The resulting reaction mixture was stirred at room temperature for 2 h. After the completion of the reaction (TLC monitoring), the reaction mass was cooled to 0° C., quenched it with 2 ml of water and concentrated under vacuum. Added water (50 ml) and extracted with ethyl acetate (3×50 ml). The combined organic layer was dried over Na2SO4, filtered and concentrated under vacuum to get the product (0.22 g, 92%) that was carried forward to the next step without further purification.

Workup

  1. customThe resulting reaction mixture
  2. customAfter the completion of the reaction (TLC monitoring)
  3. temperaturethe reaction mass was cooled to 0° C.
  4. customquenched it with 2 ml of water
  5. concentrationconcentrated under vacuum
  6. extractionAdded water (50 ml) and extracted with ethyl acetate (3×50 ml)
  7. dry with materialThe combined organic layer was dried over Na2SO4
  8. filtrationfiltered
  9. concentrationconcentrated under vacuum

Sources & evidence

ORD record
ord-1f964dd4b88b4e8582cb768019234da5
Source dataset
uspto-grants-2013_07
Patent number
US08492414B2

Reaction notes

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