Acetic Acid → methyl 5-bromo-3-(ethyl(tetrahydro-2H-thiopyran-4-yl)amino)-2-methylbenzoate

HRID 1959275Notes

Reaction equation

HRID 1959275 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([NH:13][CH:14]2[CH2:19][CH2:18][S:17][CH2:16][CH2:15]2)[C:5]([CH3:12])=[C:6]([CH:11]=1)[C:7]([O:9][CH3:10])=[O:8].[CH:20](=O)[CH3:21].C(O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C([O-])(O)=O.[Na+]>ClC(Cl)C>[Br:1][C:2]1[CH:3]=[C:4]([N:13]([CH2:20][CH3:21])[CH:14]2[CH2:19][CH2:18][S:17][CH2:16][CH2:15]2)[C:5]([CH3:12])=[C:6]([CH:11]=1)[C:7]([O:9][CH3:10])=[O:8]

Participants

7

Reactant 5

HCID 176Acetic AcidHCID 177AcetaldehydeHCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 70872555methyl 5-bromo-2-methyl-3-((tetrahydro-2H-thiopyran-4-yl)amino)benzoate

Product 1

HCID 70872488methyl 5-bromo-3-(ethyl(tetrahydro-2H-thiopyran-4-yl)amino)-2-methylbenzoateYield 92.1%

Reagents, catalysts & solvents 1

HCID 63651,1-DichloroethaneSolvent

Procedure

To a stirred solution of methyl 5-bromo-2-methyl-3-((tetrahydro-2H-thiopyran-4-yl)amino)benzoate (2.5 g, 5.83 mmol) and acetaldehyde (513 mg, 11.66 mmol) in dichloroethane (50 mL), acetic acid (2.0 ml, 34.9 mmol) was added and reaction was stirred at room temperature for 20 minutes. The reaction mixture was cooled to 0° C. and sodium triacetoxyborohydride (3.7 g, 17.49 mmol) was added and stirred at room temperature for overnight. The mixture was neutralized with sat. NaHCO3 and compound was extracted in DCM, dried over Na2SO4, concentrated under reduced pressure. The crude material was purified by column chromatography to afford methyl 5-bromo-3-(ethyl(tetrahydro-2H-thiopyran-4-yl)amino)-2-methylbenzoate (2.0 g, 74.0%).

Workup

  1. customreaction
  2. temperatureThe reaction mixture was cooled to 0° C.
  3. stirringstirred at room temperature for overnight
  4. extractionwas extracted in DCM
  5. dry with materialdried over Na2SO4
  6. concentrationconcentrated under reduced pressure
  7. customThe crude material was purified by column chromatography

Sources & evidence

ORD record
ord-1cc6a825cd5840e4b43cf10d2c19355f
Source dataset
uspto-grants-2013_04
Patent number
US08410088B2

Reaction notes

Loading…