1-Hydroxybenzotriazole → HCID 54765571, compound

HRID 1925913Notes

Reaction equation

HRID 1925913 reaction equation
[CH3:1][O:2][C:3]1[C:24]2[O:23][C:10]3[C:11](=[O:22])[N:12]([C@@H:14]([CH2:18][CH:19]([CH3:21])[CH3:20])[C:15](O)=[O:16])[CH2:13][C:9]=3[CH2:8][C:7]=2[C:6]([O:25][CH3:26])=[CH:5][CH:4]=1.[CH3:27][O:28][C:29](=[O:37])[C:30]1[CH:35]=[CH:34][C:33]([NH2:36])=[N:32][CH:31]=1.ON1C2C=CC=CC=2N=N1>C(Cl)Cl.O>[CH3:27][O:28][C:29](=[O:37])[C:30]1[CH:35]=[CH:34][C:33]([NH:36][C:15](=[O:16])[C@@H:14]([N:12]2[CH2:13][C:9]3[CH2:8][C:7]4[C:6]([O:25][CH3:26])=[CH:5][CH:4]=[C:3]([O:2][CH3:1])[C:24]=4[O:23][C:10]=3[C:11]2=[O:22])[CH2:18][CH:19]([CH3:21])[CH3:20])=[N:32][CH:31]=1

Participants

6

Reactant 3

HCID 757711-HydroxybenzotriazoleHCID 737487Methyl 6-aminonicotinateHCID 67520997HCID 67520997, compound

Product 1

HCID 54765571HCID 54765571, compoundYield 30.8%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

A solution of (S)-2-(5,8-dimethoxy-3-oxo-3,9-dihydro-1H-chromeno[2,3-c]pyrrol-2-yl)-4-methyl-pentanoic acid (Example 13, step 2c) (200 mg, 0.55 mmol), commercially available 6-aminonicotinic acid methyl ester (116 mg, 0.66 mmol), N-ethyl-N-dimethyaminopropyl carbodiimide hydrochloride (EDCI. HCl) (116 mg, 0.60 mmol), and N-hydroxybenzotriazole (HOBt) (82 mg, 0.60 mmol) in methylene chloride (10 mL) was stirred for 16 hours at 25° C. The reaction mixture was diluted with water and extracted with ethyl acetate (3×). The combined organic layers were dried over anhydrous sodium sulfate and concentrated in vacuo. The resulting residue, upon silica gel flash chromatography using hexane-ethyl acetate gradient elution, afforded 6-[(S)-2-(5,8-dimethoxy-3-oxo-3,9-dihydro-1H-chromeno[2,3-c]pyrrol-2-yl)-4-methyl-pentanoylamino]-nicotinic acid methyl ester (41 mg, 30.8%), as a white solid. 1H NMR (DMSO-d6) δ: 11.35 (s, 1H), 8.88 (br. s., 1H), 8.28 (d, J=6.8 Hz, 1H), 8.15 (d, J=8.8 Hz, 1H), 6.91 (d, J=8.8 Hz, 1H), 6.66 (d, J=8.8 Hz, 1H), 5.09 (d, J=5.9 Hz, 1H), 4.41 (s, 1H), 4.36 (br. s., 1H), 4.04 (d, J=18.6 Hz, 1H), 3.86 (s, 3H), 3.76 (s, 6H), 3.55 (br. s., 2H), 1.76-1.94 (m, 1H), 1.61-1.74 (m, 1H), 1.46 (br. s., 1H), 0.93 (t, J=5.9 Hz, 6H).

Workup

  1. extractionextracted with ethyl acetate (3×)
  2. dry with materialThe combined organic layers were dried over anhydrous sodium sulfate
  3. concentrationconcentrated in vacuo
  4. washhexane-ethyl acetate gradient elution

Sources & evidence

ORD record
ord-1a5231aba64641ccb5fbbcf966f1a67f
Source dataset
uspto-grants-2012_05
Patent number
US08178689B2

Reaction notes

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