Triethylamine → HCID 11663365, compound

HRID 506301Notes

Reaction equation

HRID 506301 reaction equation
[I:1][C:2]1[CH:3]=[C:4]2[O:8][C:7]([C:9]3[CH:14]=[CH:13][CH:12]=[CH:11][CH:10]=3)=[N:6][C:5]2=[C:15]([C:17]([OH:19])=O)[CH:16]=1.Cl.C(N=C=NCCCN(C)C)C.ON1C2C=CC=CC=2N=N1.Cl.Cl.[NH2:44][CH:45]1[CH2:52][CH:51]2[N:53]([CH3:54])[CH:47]([CH2:48][CH2:49][CH2:50]2)[CH2:46]1.C(N(CC)CC)C>CN(C=O)C.C(OCC)C>[CH3:54][N:53]1[CH:47]2[CH2:48][CH2:49][CH2:50][CH:51]1[CH2:52][CH:45]([NH:44][C:17]([C:15]1[CH:16]=[C:2]([I:1])[CH:3]=[C:4]3[O:8][C:7]([C:9]4[CH:10]=[CH:11][CH:12]=[CH:13][CH:14]=4)=[N:6][C:5]=13)=[O:19])[CH2:46]2

Participants

8

Reactant 5

HCID 8471TriethylamineHCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 189569979-Methyl-9-azabicyclo[3.3.1]nonan-3-amine;dihydrochlorideHCID 68455683HCID 68455683, compound

Product 1

HCID 11663365HCID 11663365, compoundYield 63%

Reagents, catalysts & solvents 2

HCID 3283Diethyl EtherSolventHCID 6228DimethylformamideSolvent

Procedure

A mixture of 6-iodo-2-phenylbenzoxazole-4-carboxylic acid (75 mg, 0.21 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (78 mg, 0.41 mmol), 1-hydroxybenzotriazole (55 mg, 0.41 mmol) and 3-amino-9-methyl-9-azabicyclo[3.3.1]nonane dihydrochloride (69 mg, 0.25 mmol) in DMF (5 mL) was stirred 10 min at room temperature, then triethylamine (0.10 mL, 0.82 mmol) was added. The resulting reaction mixture was stirred at room temperature overnight. The mixture was diluted with diethyl ether (50 mL) and then washed with a saturated solution of sodium bicarbonate. The aqueous layer was further extracted with ethyl acetate (2×50 mL). The combined organics were dried (Na2SO4), filtered and concentrated under reduced pressure. The crude material was purified by column chromatography (silica gel, 90:9:1 methylene chloride/methanol/concentrated ammonium hydroxide) followed by recrystallization from acetonitrile to afford N-(9-methyl-9-azabicyclo[3.3.1]non-3-yl)-6-iodo-2-phenylbenzoxazole-4-carboxamide (64 mg, 63%) as a light yellow solid: 1H NMR (500 MHz, CDCl3) δ 8.91 (br s, 1H), 8.52 (d, J=1.6 Hz, 1H), 8.25-8.20 (m, 2H), 8.06 (d, J=1.5 Hz, 1H), 7.65-7.55 (m, 3H), 4.65-4.52 (m, 1H), 3.32-3.10 (m, 2H), 2.70-2.50 (m, 5H), 2.20-1.20 (m, 2H), 1.65-1.45 (m, 4H), 1.25-1.10 (m, 2H); MS (ESI+) m/z 502 (M+H); HPLC>99% (AUC), tR=13.83 min.

Workup

  1. customThe resulting reaction mixture
  2. stirringwas stirred at room temperature overnight
  3. washwashed with a saturated solution of sodium bicarbonate
  4. extractionThe aqueous layer was further extracted with ethyl acetate (2×50 mL)
  5. dry with materialThe combined organics were dried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. customThe crude material was purified by column chromatography (silica gel, 90:9:1 methylene chloride/methanol/concentrated ammonium hydroxide)
  9. customfollowed by recrystallization from acetonitrile

Sources & evidence

ORD record
ord-d527ada6c6fd406c80c2b09a7da29645
Source dataset
uspto-grants-2010_08
Patent number
US07781430B2

Reaction notes

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