Vanillin → Ethyl 1-{4-[(4-formyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-thiazol-2-yl}piperidine-4-carboxylate

HRID 2221639Notes

Reaction equation

HRID 2221639 reaction equation
Cl[CH2:2][C:3]1[N:4]=[C:5]([N:9]2[CH2:14][CH2:13][CH:12]([C:15]([O:17][CH2:18][CH3:19])=[O:16])[CH2:11][CH2:10]2)[S:6][C:7]=1[CH3:8].[O:20]=[CH:21][C:22]1[CH:30]=[CH:29][C:27]([OH:28])=[C:24]([O:25][CH3:26])[CH:23]=1.C(=O)([O-])[O-].[K+].[K+].CN(C)C=O>O>[CH:21]([C:22]1[CH:30]=[CH:29][C:27]([O:28][CH2:2][C:3]2[N:4]=[C:5]([N:9]3[CH2:14][CH2:13][CH:12]([C:15]([O:17][CH2:18][CH3:19])=[O:16])[CH2:11][CH2:10]3)[S:6][C:7]=2[CH3:8])=[C:24]([O:25][CH3:26])[CH:23]=1)=[O:20]

Participants

6

Reactant 4

HCID 1183VanillinHCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 23076563Ethyl 1-(4-chloromethyl-5-methyl-1,3-thiazol-2-yl)piperidine-4-carboxylate

Product 1

HCID 86605740Ethyl 1-{4-[(4-formyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-thiazol-2-yl}piperidine-4-carboxylateYield 83.1%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
90 °C

Procedure

A mixture of ethyl 1-(4-chloromethyl-5-methyl-1,3-thiazol-2-yl)piperidine-4-carboxylate (1.48 g), vanillin (0.75 g), anhydrous potassium carbonate (0.68 g) and N,N-dimethylformamide (50 mL) was stirred at 90° C. for 2 hrs. Water was poured into the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography and eluted with ethyl acetate-hexane (1:3, v/v) to give ethyl 1-{4-[(4-formyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-thiazol-2-yl}piperidine-4-carboxylate as colorless crystals (1.70 g, yield 83%). Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 97-98° C.

Workup

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe organic layer was washed with saturated brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated
  5. washeluted with ethyl acetate-hexane (1:3

Sources & evidence

ORD record
ord-02f4c8a4706546ea8a995bbe86189186
Source dataset
uspto-grants-2008_05
Patent number
US07368578B2

Reaction notes

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