Triethylamine → HCID 68456707, compound

HRID 506312Notes

Reaction equation

HRID 506312 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]2[O:8][C:7]([C:9]3[CH:13]=[CH:12][S:11][CH:10]=3)=[N:6][C:5]2=[C:14]([C:16]([OH:18])=O)[CH:15]=1.Cl.Cl.[NH2:21][C@H:22]1[CH:27]2[CH2:28][CH2:29][N:24]([CH2:25][CH2:26]2)[CH2:23]1.Cl.C(N=C=NCCCN(C)C)C.ON1C2C=CC=CC=2N=N1.C(N(CC)CC)C>CN(C=O)C.ClCCl>[N:24]12[CH2:29][CH2:28][CH:27]([CH2:26][CH2:25]1)[C@H:22]([NH:21][C:16]([C:14]1[CH:15]=[C:2]([Cl:1])[CH:3]=[C:4]3[O:8][C:7]([C:9]4[CH:13]=[CH:12][S:11][CH:10]=4)=[N:6][C:5]=13)=[O:18])[CH2:23]2

Participants

8

Reactant 5

HCID 8471TriethylamineHCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 12494973(3S)-1-azabicyclo[2.2.2]octan-3-amine dihydrochlorideHCID 68457744HCID 68457744, compound

Product 1

HCID 68456707HCID 68456707, compoundYield 18%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

A mixture of 6-chloro-2-(thiophen-3-yl)benzo[d]oxazole-4-carboxylic acid (70 mg, 0.25 mmol), (S)-(−)-3-aminoquinuclidine dihydrochloride (50 mg, 0.25 mmol), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (96 mg, 0.50 mmol) and 1-hydroxybenzotriazole (68 mg, 0.50 mmol) in DMF (2 mL) was stirred at room temperature for 5 min, then triethylamine (0.13 mL, 1.0 mmol) was added. The resulting reaction mixture was stirred at room temperature for 12 h. The mixture was diluted with dichloromethane (20 mL), then washed with a saturated solution of sodium bicarbonate (10 mL). The aqueous layer was further extracted with dichloromethane (3×20 mL). The combined organics were dried (Na2SO4), filtered and concentrated. The crude material was purified by column chromatography (silica gel, 89:10:1 dichloromethane/methanol/concentrated ammonium hydroxide) followed by recrystallization from acetonitrile to afford (S)—N-(1-azabicyclo[2.2.2]oct-3-yl)-6-chloro-2-thiophen-3-ylbenzoxazole-4-carboxamide (17 mg, 18%) as a colorless crystal: 1H NMR (500 MHz, CDCl3) δ 9.41 (d, J=7.5 Hz, 1H), 8.23 (dd, J=3.0, 1.5 Hz, 1H), 8.16 (d, J=2.0 Hz, 1H), 7.73 (dd, J=5.0, 1.0 Hz, 1H), 7.68 (d, J=2.0 Hz, 1H), 7.52 (dd, J=5.0, 3.0 Hz, 1H), 4.29-4.25 (m, 1H), 3.49 (ddd, J=11.5, 9.5, 2.0 Hz, 1H), 3.10-2.83 (m, 4H), 2.77 (dd, J=14.0, 4.5 Hz, 1H), 2.15-2.11 (m, 1H), 2.04-1.98 (m, 1H), 1.78-1.70 (m, 2H), 1.60-1.51 (m, 1H); MS (ESI+) m/z 388 (M+H); HPLC>99% (AUC), tR=12.45 min.

Workup

  1. customThe resulting reaction mixture
  2. stirringwas stirred at room temperature for 12 h
  3. washwashed with a saturated solution of sodium bicarbonate (10 mL)
  4. extractionThe aqueous layer was further extracted with dichloromethane (3×20 mL)
  5. dry with materialThe combined organics were dried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe crude material was purified by column chromatography (silica gel, 89:10:1 dichloromethane/methanol/concentrated ammonium hydroxide)
  9. customfollowed by recrystallization from acetonitrile

Sources & evidence

ORD record
ord-1bd6de4ae1e348cd8aa62beddd13b0b2
Source dataset
uspto-grants-2010_08
Patent number
US07781430B2

Reaction notes

Loading…