Methanesulfonyl chloride → HCID 18464661, compound

HRID 2230617Notes

Reaction equation

HRID 2230617 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:14][CH2:13][CH2:12][N:11]([C:15]2[N:19]([CH2:20][CH2:21][OH:22])[C:18]3[CH:23]=[CH:24][CH:25]=[CH:26][C:17]=3[N:16]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(N(CC)C(C)C)(C)C.[CH3:36][S:37](Cl)(=[O:39])=[O:38]>ClCCl>[C:1]([O:5][C:6]([N:8]1[CH2:14][CH2:13][CH2:12][N:11]([C:15]2[N:19]([CH2:20][CH2:21][O:22][S:37]([CH3:36])(=[O:39])=[O:38])[C:18]3[CH:23]=[CH:24][CH:25]=[CH:26][C:17]=3[N:16]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

5

Reactant 3

HCID 31297Methanesulfonyl chlorideHCID 81531DiisopropylethylamineHCID 184648041-t-butoxycarbonyl-4-(1-(2-hydroxyethyl)-1H-benzimidazol-2-yl)[1,4]diazepane

Product 1

HCID 18464661HCID 18464661, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

Combine 1-(t-butoxycarbonyl)-4-(1-(2-hydroxyethyl)-1H-benzimidazol-2-yl)[1,4]diazepane (1.0 g, 2.77 mmol), N,N-diisopropylethylamine (0.79 g, 6.1 mmol), and dichloromethane (10 mL). Cool in an ice bath. Add dropwise methanesulfonyl chloride (0.41 g, 3.6 mmol). After 1 hour, warm to ambient temperature and dilute the reaction mixture with dichloromethane. Extract with a 1 M aqueous hydrochloric acid solution and three times with saturated aqueous sodium bicarbonate solution. Dry the organic layer over Na2SO4, filter, and concentrate in vacuo to give 1-(t-butoxycarbonyl)-4-(1-(2-methanesulfonyloxyethyl)-1H-benzimidazol-2-yl)[1,4]diazepane: Rf=0.58 (silica gel, ethyl acetate).

Workup

  1. temperatureCool in an ice bath
  2. extractionExtract with a 1 M aqueous hydrochloric acid solution and three times with saturated aqueous sodium bicarbonate solution
  3. dry with materialDry the organic layer over Na2SO4
  4. filtrationfilter
  5. concentrationconcentrate in vacuo

Sources & evidence

ORD record
ord-f41251e4e23c4b648a406680fa3be6f2
Source dataset
uspto-grants-2002_07
Patent number
US06423704B1

Reaction notes

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