Carbon Dioxide → 3,4,5,6-Tetrahydro-2,3,10-triaza-benzo[e]azulene-1-carboxylic acid

HRID 23431Notes

Reaction equation

HRID 23431 reaction equation
[Li]C(C)(C)C.Br[C:7]1[C:16]2[C:15]3[N:17]=[CH:18][CH:19]=[CH:20][C:14]=3[CH2:13][CH2:12][CH2:11][C:10]=2[NH:9][N:8]=1.[C:21](=[O:23])=[O:22]>CCCCC.C1COCC1>[C:7]1([C:21]([OH:23])=[O:22])[C:16]2[C:15]3[N:17]=[CH:18][CH:19]=[CH:20][C:14]=3[CH2:13][CH2:12][CH2:11][C:10]=2[NH:9][N:8]=1

Participants

6

Reactant 3

HCID 280Carbon DioxideHCID 121330681-Bromo-3,4,5,6-tetrahydro-2,3,10-triaza-benzo[e]azuleneHCID 178418306HCID 178418306, compound

Product 1

HCID 121330693,4,5,6-Tetrahydro-2,3,10-triaza-benzo[e]azulene-1-carboxylic acid

Reagents, catalysts & solvents 2

HCID 8003PentaneSolventHCID 8028TetrahydrofuranSolvent

Procedure

7.8 mL of 1.7 M of t-BuLi in pentane is added dropwise under argon to a stirred solution of 1-bromo-3,4,5,6-tetrahydro-2,3,10-triaza-benzo[e]azulene (1.4 g) in 75 mL of anhydrous THF at −78° C. After addition, dry carbon dioxide is bubbled into the mixture at the same temperature for 2 hours. The reaction mixture is allowed to warm to room temperature, quenched with 1N HCl solution, and diluted with water. The mixture is basified with 1N NaOH to pH 8-9, and then extracted with EtOAc. The aqueous layer is then acidified with HOAc to pH 4-5 and extracted with CH2Cl2 eight times. The combined extracts are washed with water, dried, and concentrated to give 3,4,5,6-tetrahydro-2,3,10-triaza-benzo[e]azulene-1-carboxylic acid as a tan solid. 1H NMR(DMSO): 1.95(m, 2H), 2.96(m, 2H), 3.07(t, 2H), 7.45(m,1H), 7.97(d,1H), 8.52(d, 2H). LR-MS: MW 229.23, Found: 230.2(M+1). Step 6: A mixture of 3,4,5,6-tetrahydro-2,3,10-triaza-benzo[e]azulene-1-carboxylic acid (80 mg), 1-(3-azetidin-1-yl-propyl)-1H-pyrazol-3-ylamine (68 mg), EDCI(85 mg) and DMAP(55 mg) in 10 mL of 1,2-dichloroethane is refluxed overnight, cooled and diluted with CH2Cl2. The mixture is washed with aqueous NaHCO3 solution, water, dried over Na2SO4 and concentrated under vacuum. Purification on a silica gel plate, eluting with 10% MeOH in CH2Cl2 yields 12 mg of 3,4,5,6-tetrahydro-2,3,10-triaza-benzo[e]azulene-1-carboxylic acid [1-(3-azetidin-1-yl-propyl)-1H-pyrazol-3-yl]-amide as a colorless foam. 1H NMR (CDCl3): 2.01-2.31(m, 6H), 2.67-2.92(m, 8H), 3.63(m, 2H), 4.17(t, 2H), 6.65(d, 1H), 7.23(m, 1H), 7.33(d, 1H), 7.65(d, 1H), 8.62(d, 1H), 14.13(bs, 1H). LR-MS: MW 391.48, Found: 392.2 (M+1).

Workup

  1. customis bubbled into the mixture at the same temperature for 2 hours
  2. customquenched with 1N HCl solution
  3. additiondiluted with water
  4. extractionextracted with EtOAc
  5. extractionextracted with CH2Cl2 eight times
  6. washThe combined extracts are washed with water
  7. customdried
  8. concentrationconcentrated

Sources & evidence

ORD record
ord-8cb546064d2d461481674853f13a939f
Source dataset
uspto-grants-2005_02
Patent number
US06852730B2

Reaction notes

Loading…