1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 6-{(1E)-3-Oxo-3-[3-(pentyloxy)azetidin-1-yl]prop-1-en-1-yl}-3,4-dihydro-1,8-naphthyridin-2(1H)-one

HRID 2171994Notes

Reaction equation

HRID 2171994 reaction equation
Cl.[O:2]=[C:3]1[NH:12][C:11]2[N:10]=[CH:9][C:8](/[CH:13]=[CH:14]/[C:15]([OH:17])=O)=[CH:7][C:6]=2[CH2:5][CH2:4]1.C1(C(C2C=CC=CC=2)[N:25]2[CH2:28][CH:27]([O:29][CH2:30][CH2:31][CH2:32][CH2:33][CH3:34])[CH2:26]2)C=CC=CC=1.CCN(C(C)C)C(C)C.CCN=C=NCCCN(C)C>CN(C=O)C>[O:17]=[C:15]([N:25]1[CH2:28][CH:27]([O:29][CH2:30][CH2:31][CH2:32][CH2:33][CH3:34])[CH2:26]1)/[CH:14]=[CH:13]/[C:8]1[CH:7]=[C:6]2[C:11](=[N:10][CH:9]=1)[NH:12][C:3](=[O:2])[CH2:4][CH2:5]2

Participants

6

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 81531DiisopropylethylamineHCID 66905305(E)-3-(7-oxo-5,6,7,8-tetrahydro-1,8-naphthyridin-3-yl)acrylic Acid HydrochlorideHCID 671545431-(Diphenylmethyl)-3-(pentyloxy)azetidine

Product 1

HCID 529504876-{(1E)-3-Oxo-3-[3-(pentyloxy)azetidin-1-yl]prop-1-en-1-yl}-3,4-dihydro-1,8-naphthyridin-2(1H)-oneYield 9.1%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A 16 mL vial flask was successively charged with (2E)-3-(7-oxo-5,6,7,8-tetrahydro-1,8-naphthyridin-3-yl)acrylic acid hydrochloride (40 mg, 0.16 mmol), DMF (3.8 mL), 1-(diphenylmethyl)-3-(pentyloxy)azetidine (34 mg, 0.19 mmol; which may be prepared as described in Step 2), DIPEA (63 μL, 0.38 mmol) and EDAC (36 mg, 0.19 mmol). The reaction mixture was stirred at room temperature for 48 h and concentrated to dryness. The residue was purified on preparative TLC (eluent: dichloromethane/MeOH, 9/1) to give a beige solid. This solid was triturated in acetone to give the title compound (5 mg, 9%) as a white solid.

Workup

  1. concentrationconcentrated to dryness
  2. customThe residue was purified on preparative TLC (eluent: dichloromethane/MeOH, 9/1)
  3. customto give a beige solid
  4. customThis solid was triturated in acetone

Sources & evidence

ORD record
ord-b1d5322c275e49ef94477089f3e17c88
Source dataset
uspto-grants-2015_06
Patent number
US09051321B2

Reaction notes

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