Triethylamine → Methyl 7-(3-{[(3-isopropylphenyl)amino]carbonyl}phenyl)-5,6,7,8-tetrahydro-2,7-naphthyridine-4-carboxylate

HRID 338772Notes

Reaction equation

HRID 338772 reaction equation
[CH3:1][O:2][C:3]([C:5]1[CH:14]=[N:13][CH:12]=[C:11]2[C:6]=1[CH2:7][CH2:8][N:9]([C:15]1[CH:16]=[C:17]([CH:21]=[CH:22][CH:23]=1)[C:18]([OH:20])=O)[CH2:10]2)=[O:4].C(N(CC)CC)C.CCCP(=O)=O.[CH:37]([C:40]1[CH:41]=[C:42]([CH:44]=[CH:45][CH:46]=1)[NH2:43])([CH3:39])[CH3:38]>CN(C1C=CN=CC=1)C.ClCCCl>[CH:37]([C:40]1[CH:41]=[C:42]([NH:43][C:18]([C:17]2[CH:16]=[C:15]([N:9]3[CH2:10][C:11]4[CH:12]=[N:13][CH:14]=[C:5]([C:3]([O:2][CH3:1])=[O:4])[C:6]=4[CH2:7][CH2:8]3)[CH:23]=[CH:22][CH:21]=2)=[O:20])[CH:44]=[CH:45][CH:46]=1)([CH3:39])[CH3:38]

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 4586793-IsopropylanilineHCID 16167369Propylphosphoric anhydrideHCID 866958813-[5-(methoxycarbonyl)-3,4-dihydro-2,7-naphthyridin-2(1H)-yl]benzoic acid

Product 1

HCID 71736176Methyl 7-(3-{[(3-isopropylphenyl)amino]carbonyl}phenyl)-5,6,7,8-tetrahydro-2,7-naphthyridine-4-carboxylateYield 68.7%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 111,2-DichloroethaneSolvent

Procedure

To a mixture of 3-[5-(methoxycarbonyl)-3,4-dihydro-2,7-naphthyridin-2(1H)-yl]benzoic acid (63 mg, 0.20 mmol), triethylamine (0.056 mL, 0.40 mmol), and catalytic DMAP in 2.0 mL 1,2-dichloroethane at rt was added propylphosphonic anhydride solution (50 wt % in EtOAc, 0.143 mL, 0.24 mmol). After 10 min at rt, 3-isopropylaniline (0.042 mL, 0.30 mmol) was added and the reaction stirred at rt for 1 hour. The reaction was quenched into aqueous NaHCO3 solution, extracted with EtOAc, the EtOAc layer washed with H2O, dilute aqueous NaHCO3 solution, brine, dried with anhydrous Na2SO4 and rotary evaporated. This material was chromatographed eluting with CHCl3/EtOAc to give the title compound as a light yellow solid (59 mg, 68%). 1H NMR (Acetone-d6) δ: 9.39 (br. s., 1H), 8.89 (s, 1H), 8.66 (s, 1H), 7.72-7.74 (m, 1H), 7.66-7.71 (m, 2H), 7.35-7.44 (m, 2H), 7.25-7.30 (m, 2H), 7.00 (d, J=7.6 Hz, 1H), 4.60 (s, 2H), 3.91 (s, 3H), 3.66-3.71 (m, 2H), 3.37 (t, J=5.9 Hz, 2H), 2.91 (spt, J=6.9 Hz, 1H), 1.25 (d, J=7.0 Hz, 6H)

Workup

  1. customThe reaction was quenched into aqueous NaHCO3 solution
  2. extractionextracted with EtOAc
  3. washthe EtOAc layer washed with H2O, dilute aqueous NaHCO3 solution, brine
  4. dry with materialdried with anhydrous Na2SO4 and rotary evaporated
  5. customThis material was chromatographed
  6. washeluting with CHCl3/EtOAc

Sources & evidence

ORD record
ord-0257680e480d4e81b3c831482e36310f
Source dataset
uspto-grants-2014_11
Patent number
US08889870B2

Reaction notes

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