Lithium hydroxide, monohydrate → 6-(Benzenesulphonylmethyl)-2-[2-(t-butoxycarbonylamino)ethylamino]-3-(furan-3-yl)benzoic acid

HRID 2177784Notes

Reaction equation

HRID 2177784 reaction equation
[C:1]1([S:7]([CH2:10][C:11]2[C:16]([C:17]([O:19]C)=[O:18])=[C:15]([NH:21][CH2:22][CH2:23][NH:24][C:25]([O:27][C:28]([CH3:31])([CH3:30])[CH3:29])=[O:26])[C:14]([C:32]3[CH:36]=[CH:35][O:34][CH:33]=3)=[CH:13][CH:12]=2)(=[O:9])=[O:8])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.O.[OH-].[Li+]>O.O1CCOCC1>[C:1]1([S:7]([CH2:10][C:11]2[C:16]([C:17]([OH:19])=[O:18])=[C:15]([NH:21][CH2:22][CH2:23][NH:24][C:25]([O:27][C:28]([CH3:30])([CH3:31])[CH3:29])=[O:26])[C:14]([C:32]3[CH:36]=[CH:35][O:34][CH:33]=3)=[CH:13][CH:12]=2)(=[O:9])=[O:8])[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

5

Reactant 2

HCID 168937Lithium hydroxide, monohydrateHCID 67108007Methyl 6-(benzenesulphonylmethyl)-2-[2-(t-butoxycarbonylamino)ethylamino]-3-(furan-3-yl)benzoate2×

Product 1

HCID 671077416-(Benzenesulphonylmethyl)-2-[2-(t-butoxycarbonylamino)ethylamino]-3-(furan-3-yl)benzoic acidYield 89.4%

Reagents, catalysts & solvents 2

HCID 962WaterSolvent2×HCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

Methyl 6-(benzenesulphonylmethyl)-2-[2-(t-butoxycarbonylamino)-ethylamino]-3-(furan-3-yl)benzoate (Intermediate 122, 0.115 g) was added to a solution of lithium hydroxide monohydrate (0.168 g) in water (1 ml) and dioxane (3 ml) and the mixture was heated at 100° C. for 1 hour. The reaction was cooled to room temperature, diluted with water and washed with diethyl ether. The aqueous layer was acidified with acetic acid and extracted with ethyl acetate, dried (Na2SO4) and filtered. The filtrate was evaporated to dryness and the residue was purified by chromatography on silica, eluting with a mixture of DCM:MeOH:AcOH:water (350:20:3:2) to give 6-(benzenesulphonylmethyl)-2-[2-(tert-butoxycarbonylamino)-ethylamino]-3-(furan-3-yl)benzoic acid (0.1 g) as a pale yellow gum.

Workup

  1. temperatureThe reaction was cooled to room temperature
  2. washwashed with diethyl ether
  3. extractionextracted with ethyl acetate
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. customThe filtrate was evaporated to dryness
  7. customthe residue was purified by chromatography on silica
  8. washeluting with a mixture of DCM:MeOH:AcOH:water (350:20:3:2)

Sources & evidence

ORD record
ord-5457a007b60b4146b84938649f56d6d3
Source dataset
uspto-grants-2015_06
Patent number
US09067905B2

Reaction notes

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