1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → tert-Butyl ({3-[6-(4-Oxo-4H-1,3-benzothiazin-2-yl)-2-pyridyl]propanoyl}amino)acetate

HRID 499598Notes

Reaction equation

HRID 499598 reaction equation
[O:1]=[C:2]1[C:7]2[CH:8]=[CH:9][CH:10]=[CH:11][C:6]=2[S:5][C:4]([C:12]2[N:17]=[C:16]([CH2:18][CH2:19][C:20]([OH:22])=O)[CH:15]=[CH:14][CH:13]=2)=[N:3]1.[C:23]([O:27][C:28](=[O:31])[CH2:29][NH2:30])([CH3:26])([CH3:25])[CH3:24].CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1>CN(C)C=O>[O:1]=[C:2]1[C:7]2[CH:8]=[CH:9][CH:10]=[CH:11][C:6]=2[S:5][C:4]([C:12]2[N:17]=[C:16]([CH2:18][CH2:19][C:20]([NH:30][CH2:29][C:28]([O:27][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:31])=[O:22])[CH:15]=[CH:14][CH:13]=2)=[N:3]1

Participants

6

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 151417Glycine tert-butyl esterHCID 99013333-[6-(4-Oxo-4H-1,3-benzothiazin-2-yl)-2-pyridyl]propionic acid

Product 1

HCID 59750322tert-Butyl ({3-[6-(4-Oxo-4H-1,3-benzothiazin-2-yl)-2-pyridyl]propanoyl}amino)acetateYield 99.1%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

3-[6-(4-oxo-4H-1,3-benzothiazin-2-yl)-2-pyridyl]propionic acid (0.20 g, 0.64 mmol) as dissolved in N,N-dimethylformamide (3 ml), and glycine tert-butyl ester (0.11 g, 0.67 mmol), WSC (0.25 g, 1.3 mmol) and HOBt (0.18 g, 1.3 mmol) were added successively thereto. The reaction mixture was stirred at room temperature for 17 hrs, concentrated under reduced pressure and combined with ethyl acetate and water. The organic layer was washed with saturated brine and dried over anhydrous magnesium sulfate. The solvent was evaporated, and the residue was subjected to a silica gel (15 g) column chromatography. The fractions eluted with hexane-ethyl acetate (1:1, v/v) were collected and concentrated to give the titled compound (0.27 g, 99%) as white crystals.

Workup

  1. concentrationconcentrated under reduced pressure
  2. washThe organic layer was washed with saturated brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. customThe solvent was evaporated
  5. washThe fractions eluted with hexane-ethyl acetate (1:1
  6. customv/v) were collected
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-842f4001468b4f658f8a73acee9ceb82
Source dataset
uspto-grants-2010_08
Patent number
US07767665B2

Reaction notes

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