Lithium Hydroxide → 2-Cyclohexyl-1,3-thiazole-4-carboxylic acid

HRID 531365Notes

Reaction equation

HRID 531365 reaction equation
C([O:3][C:4]([C:6]1[N:7]=[C:8]([CH:11]2[CH2:16][CH2:15][CH2:14][CH2:13][CH2:12]2)[S:9][CH:10]=1)=[O:5])C.[Li+].[OH-]>O>[CH:11]1([C:8]2[S:9][CH:10]=[C:6]([C:4]([OH:5])=[O:3])[N:7]=2)[CH2:12][CH2:13][CH2:14][CH2:15][CH2:16]1

Participants

4

Reactant 2

HCID 3939Lithium HydroxideHCID 57956421Ethyl 2-cyclohexylthiazole-4-carboxylate

Product 1

HCID 234049342-Cyclohexyl-1,3-thiazole-4-carboxylic acidYield 83%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

To a solution of 2-cyclohexylthiazole-4-carboxylic acid ethyl ester (116, 6.8 g, 28.5 mmol) in water was added 1M LiOH (50 mL). The solution was kept at room temperature and monitored by LC-MS. When the hydrolysis was completed the reaction mixture was neutralized with myriatic acid and extracted with ethyl acetate and diethyl ether. The organic phase was dried (Na2SO4), filtered and concentrated under reduced pressure to give 5.0 g (83%) of the title compound 117: m/z=212 (M+H)+.

Workup

  1. customwas kept at room temperature
  2. extractionextracted with ethyl acetate and diethyl ether
  3. dry with materialThe organic phase was dried (Na2SO4)
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-681754614e7842eb97311ad470f8177b
Source dataset
uspto-grants-2016_05
Patent number
US09353103B2

Reaction notes

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