Sodium Hydroxide → 2-{3-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulen-9-yl]-azetidine-1-sulfonyl}-ethanol

HRID 1190596Notes

Reaction equation

HRID 1190596 reaction equation
[NH:1]1[CH2:4][CH:3]([C:5]2[CH:6]=[CH:7][C:8]3[O:17][CH2:16][CH2:15][C:14]4[S:13][C:12]([C:18]5[N:19]([CH:23]([CH3:25])[CH3:24])[N:20]=[CH:21][N:22]=5)=[N:11][C:10]=4[C:9]=3[CH:26]=2)[CH2:2]1.Cl[CH2:28][CH2:29][S:30](Cl)(=[O:32])=[O:31].[OH-:34].[Na+]>C1COCC1>[CH:23]([N:19]1[C:18]([C:12]2[S:13][C:14]3[CH2:15][CH2:16][O:17][C:8]4[CH:7]=[CH:6][C:5]([CH:3]5[CH2:4][N:1]([S:30]([CH2:29][CH2:28][OH:34])(=[O:32])=[O:31])[CH2:2]5)=[CH:26][C:9]=4[C:10]=3[N:11]=2)=[N:22][CH:21]=[N:20]1)([CH3:24])[CH3:25]

Participants

5

Reactant 3

HCID 14798Sodium HydroxideHCID 15385Ethanesulfonylchloride, 2-chloro-2×HCID 670505299-azetidin-3-yl-2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene

Product 1

HCID 582041062-{3-[2-(2-Isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulen-9-yl]-azetidine-1-sulfonyl}-ethanolYield 23%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 9-azetidin-3-yl-2-(2-isopropyl-2H-[1,2,4]triazol-3-yl)-4,5-dihydro-6-oxa-3-thia-1-aza-benzo[e]azulene (0.20 g, 0.54 mmol) in dry THF (20 mL) at 0° C. was added 2-chloroethanesulfonyl chloride (65 μL, 0.6 mmol) and the reaction mixture was stirred at RT for 18 hours. The reaction mixture was cooled to 0° C. and a further 2-chloroethanesulfonyl chloride (1304) was added and the reaction mixture was stirred at RT for 18 hours. An aqueous sodium hydroxide solution (8M, 3.38 mL, 27 mmol) was added and the mixture was heated at 40° C. for 18 hours then concentrated in vacuo. The resultant residue was extracted several times with 10% MeOH in DCM and the combined extracts concentrated in vacuo. The residue was purified by flash chromatography (SiO2, 0-20% MeOH in DCM) followed by preparative HPLC (Gemini C18 column, gradient 5-95% MeOH in H2O+0.1% HCO2H) to give 394 (58 mg, 23%). LCMS: RT=8.45 min, [M+H]+=476. 1H NMR δ (ppm) (DMSO-d6, 80° C.): 8.22 (1H, d, J=2.31 Hz), 8.01 (1H, s), 7.33 (1H, dd, J=8.34, 2.39 Hz), 7.08 (1H, d, J=8.32 Hz), 5.81-5.73 (1H, m), 4.53 (2H, s), 4.37 (2H, t, J=5.09 Hz), 4.22 (3H, s), 3.57 (2H, t, J=6.26 Hz), 3.43 (2H, t, J=5.09 Hz), 2.79 (2H, t, J=6.37 Hz), 1.59 (6H, d, J=6.61 Hz). 1 Exchangeable proton not observed

Workup

  1. temperatureThe reaction mixture was cooled to 0° C.
  2. stirringthe reaction mixture was stirred at RT for 18 hours
  3. temperaturethe mixture was heated at 40° C. for 18 hours
  4. concentrationthen concentrated in vacuo
  5. extractionThe resultant residue was extracted several times with 10% MeOH in DCM
  6. concentrationthe combined extracts concentrated in vacuo
  7. customThe residue was purified by flash chromatography (SiO2, 0-20% MeOH in DCM)

Sources & evidence

ORD record
ord-5e7807dbbd97409cbce0bc1357766b6b
Source dataset
uspto-grants-2014_03
Patent number
US08673952B2

Reaction notes

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