Acetic Acid → HCID 22242760, compound

HRID 891615Notes

Reaction equation

HRID 891615 reaction equation
[Si:1]([O:18][CH:19]1[CH2:22][N:21]([C:23]2[S:24][CH:25]=[C:26]([C:28](OCC)=[O:29])[N:27]=2)[CH2:20]1)([C:14]([CH3:17])([CH3:16])[CH3:15])([C:8]1[CH:13]=[CH:12][CH:11]=[CH:10][CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH3:33][O:34][CH:35]1[CH2:38][NH:37][CH2:36]1.C[Al](C)C.C(O)(=O)C.C(OCC)(=O)C>C1(C)C=CC=CC=1.C1C=CC=CC=1>[Si:1]([O:18][CH:19]1[CH2:20][N:21]([C:23]2[S:24][CH:25]=[C:26]([C:28]([N:37]3[CH2:38][CH:35]([O:34][CH3:33])[CH2:36]3)=[O:29])[N:27]=2)[CH2:22]1)([C:14]([CH3:15])([CH3:17])[CH3:16])([C:8]1[CH:9]=[CH:10][CH:11]=[CH:12][CH:13]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

7

Reactant 4

HCID 176Acetic AcidHCID 8857Ethyl Acetate2×HCID 222429823-t-Butyldiphenylsilyloxy-1-(4-ethoxycarbonyl-1,3-thiazol-2-yl)azetidineHCID 22243047HCID 22243047, compound

Product 1

HCID 22242760HCID 22242760, compoundYield 67%

Reagents, catalysts & solvents 2

HCID 241BenzeneSolventHCID 1140TolueneSolvent

Conditions

Temperature
80 °C

Procedure

Subsequently, to a solution of 3-t-butyldiphenylsilyloxy-1-(4-ethoxycarbonyl-1,3-thiazol-2-yl)azetidine (500 mg, 1.07 mmol) in toluene (25 ml) was added a solution of 0.67M 3-methoxyazetidine-trimethylaluminium in benzene (3.21 ml) at room temperature under an atmosphere of nitrogen. The mixture was stirred in a water bath (80° C.) for 1 hour. After checking the completion of the reaction, 10% aqueous acetic acid solution (20 ml) and ethyl acetate (50 ml) were added to the reaction mixture in an ice bath, and the resulting mixture was stirred at room temperature for 1 hour. After adding ethyl acetate thereto, the reaction mixture was partitioned between ethyl acetate and water. The obtained organic layer was washed successively with saturated aqueous sodium hydrogencarbonate solution and saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by chromatography on a silica gel column using ethyl acetate as the eluant to afford 3-t-butyldiphenylsilyloxy-1-[4-(3-methoxyazetidine-1-carbonyl)-1,3-thiazol-2-yl]azetidine (366 mg, yield 67%) as a pale brown solid.

Workup

  1. additionwere added to the reaction mixture in an ice bath
  2. stirringthe resulting mixture was stirred at room temperature for 1 hour
  3. customthe reaction mixture was partitioned between ethyl acetate and water
  4. washThe obtained organic layer was washed successively with saturated aqueous sodium hydrogencarbonate solution and saturated aqueous sodium chloride solution
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. customThe residue was purified by chromatography on a silica gel column

Sources & evidence

ORD record
ord-c49eefeed80542a597851950d795a1e0
Source dataset
uspto-grants-2006_02
Patent number
US07001897B2

Reaction notes

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