Acetyl chloride → 7-(Acetylamino-methyl)-2-amino-6-(4-methoxy-benzyl)-4,5,6,7-tetrahydro-thieno[2,3-c]pyridine-3-carboxylic acid tert-butyl ester

HRID 1166805Notes

Reaction equation

HRID 1166805 reaction equation
[C:1]([O:5][C:6]([C:8]1[C:16]2[CH2:15][CH2:14][N:13]([CH2:17][C:18]3[CH:23]=[CH:22][C:21]([O:24][CH3:25])=[CH:20][CH:19]=3)[CH:12]([CH2:26][NH2:27])[C:11]=2[S:10][C:9]=1[NH2:28])=[O:7])([CH3:4])([CH3:3])[CH3:2].[C:29](Cl)(=[O:31])[CH3:30]>ClCCl>[C:1]([O:5][C:6]([C:8]1[C:16]2[CH2:15][CH2:14][N:13]([CH2:17][C:18]3[CH:19]=[CH:20][C:21]([O:24][CH3:25])=[CH:22][CH:23]=3)[CH:12]([CH2:26][NH:27][C:29](=[O:31])[CH3:30])[C:11]=2[S:10][C:9]=1[NH2:28])=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

4

Reactant 2

HCID 6367Acetyl chlorideHCID 219366842-Amino-7-aminomethyl-6-(4-methoxy-benzyl)-4,5,6,7-tetrahydro-thieno[2,3-c]pyridine-3-carboxylic acid tert-butyl ester

Product 1

HCID 695604547-(Acetylamino-methyl)-2-amino-6-(4-methoxy-benzyl)-4,5,6,7-tetrahydro-thieno[2,3-c]pyridine-3-carboxylic acid tert-butyl esterYield 86%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
0 °C

Procedure

2-Amino-7-aminomethyl-6-(4-methoxy-benzyl)-4,5,6,7-tetrahydro-thieno[2,3-c]pyridine-3-carboxylic acid tert-butyl ester (141 mg, 0.25 mmol, prepared as described in Example 1) and diisopropypethylamine (75 μl, 0.43 mmol) were dissolved in dichloromethane (10 ml) with stirring. The flask was then flush with nitrogen and sealed with a rubber septum before being cooled to 0° C. Acetyl chloride (20 μl, 0.28 mmol) was added dropwise to the solution, which was then warmed slowly to room temperature. After 2 hours of stirring, the reaction was concentrated to dryness in vacuo. The residue was purified by silica gel chromatography using a mixture of hexane/ethyl acetate (3:1) as eluent, which afforded 95 mg (86%) of 7-(acetylamino-methyl)-2-amino-6-(4-methoxy-benzyl)-4,5,6,7-tetrahydro-thieno[2,3-c]pyridine-3-carboxylic acid tert-butyl ester as a solid.

Workup

  1. customThe flask was then flush with nitrogen
  2. customsealed with a rubber septum
  3. temperaturewas then warmed slowly to room temperature
  4. stirringAfter 2 hours of stirring
  5. concentrationthe reaction was concentrated to dryness in vacuo
  6. customThe residue was purified by silica gel chromatography
  7. additiona mixture of hexane/ethyl acetate (3:1) as eluent

Sources & evidence

ORD record
ord-191b2c9e0bc64fc7b8971689246188ec
Source dataset
uspto-grants-2003_09
Patent number
US06613903B2

Reaction notes

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