1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → Ethyl 1-(3-(2-(5,5-bis(2-methoxy-2-oxoethyl)-4,5-dihydro-1,2-oxazol-3-yl)-4-hydroxyphenyl)propanoyl)piperidine-4-carboxylate

HRID 1486905Notes

Reaction equation

HRID 1486905 reaction equation
[CH3:1][O:2][C:3](=[O:27])[CH2:4][C:5]1([CH2:22][C:23](=[O:26])[O:24][CH3:25])[O:9][N:8]=[C:7]([C:10]2[CH:15]=[C:14]([OH:16])[CH:13]=[CH:12][C:11]=2[CH2:17][CH2:18][C:19](O)=[O:20])[CH2:6]1.[NH:28]1[CH2:33][CH2:32][CH:31]([C:34]([O:36][CH2:37][CH3:38])=[O:35])[CH2:30][CH2:29]1.CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1>O.CN(C=O)C.C(N(CC)CC)C>[CH3:25][O:24][C:23](=[O:26])[CH2:22][C:5]1([CH2:4][C:3](=[O:27])[O:2][CH3:1])[O:9][N:8]=[C:7]([C:10]2[CH:15]=[C:14]([OH:16])[CH:13]=[CH:12][C:11]=2[CH2:17][CH2:18][C:19]([N:28]2[CH2:33][CH2:32][CH:31]([C:34]([O:36][CH2:37][CH3:38])=[O:35])[CH2:30][CH2:29]2)=[O:20])[CH2:6]1

Participants

8

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 70770Ethyl 4-piperidinecarboxylateHCID 757711-HydroxybenzotriazoleHCID 1182927643-(2-(5,5-Bis(2-methoxy-2-oxoethyl)-4,5-dihydro-1,2-oxazol-3-yl)-4-hydroxyphenyl)propanoic acid

Product 1

HCID 118292833Ethyl 1-(3-(2-(5,5-bis(2-methoxy-2-oxoethyl)-4,5-dihydro-1,2-oxazol-3-yl)-4-hydroxyphenyl)propanoyl)piperidine-4-carboxylate

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8471TriethylamineSolvent

Procedure

A mixture of 3-(2-(5,5-bis(2-methoxy-2-oxoethyl)-4,5-dihydro-1,2-oxazol-3-yl)-4-hydroxyphenyl)propanoic acid (820 mg), ethyl piperidine-4-carboxylate (0.366 mL), WSC (497 mg), HOBt (350 mg), triethylamine (0.362 mL), and DMF (8 mL) was stirred overnight at room temperature. To the reaction mixture, water was added, followed by extraction with ethyl acetate. The extract was washed with brine and dried over anhydrous magnesium sulfate, and then, the solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate/hexane) to obtain the title compound (760 mg).

Workup

  1. extractionfollowed by extraction with ethyl acetate
  2. washThe extract was washed with brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. distillationthe solvent was distilled off under reduced pressure
  5. customThe residue was purified by silica gel column chromatography (ethyl acetate/hexane)

Sources & evidence

ORD record
ord-2e497ee4e95a473ab392341e9b732734
Source dataset
uspto-grants-2016_08
Patent number
US09428470B2

Reaction notes

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