Hydrochloric Acid → HCID 22319642, compound

HRID 25389Notes

Reaction equation

HRID 25389 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([S:8]([NH:11][C:12]2[CH:13]=[C:14]3[C:18](=[CH:19][CH:20]=2)[NH:17][N:16]=[C:15]3[NH:21]C(=O)C2C=CC=CC=2)(=[O:10])=[O:9])[CH:5]=[CH:6][CH:7]=1.Cl>C(O)C>[NH2:21][C:15]1[C:14]2[C:18](=[CH:19][CH:20]=[C:12]([NH:11][S:8]([C:4]3[CH:5]=[CH:6][CH:7]=[C:2]([F:1])[CH:3]=3)(=[O:10])=[O:9])[CH:13]=2)[NH:17][N:16]=1

Participants

4

Reactant 2

HCID 313Hydrochloric AcidHCID 10431680N-[5-(3-fluorobenzenesulfonylamino)-1H-indazol-3-yl]benzamide

Product 1

HCID 22319642HCID 22319642, compoundYield 44.7%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

N-(3-Amino-1H-indazol-5-yl)-3-fluorobenzenesulfonamide can be obtained in the following way: a solution of 0.3 g of N-[5-(3-fluorobenzenesulfonylamino)-1H-indazol-3-yl]benzamide, of 24 ml of ethanol and of 1.08 ml of 37% hydrochloric acid is heated at a temperature in the region of 100° C. for 30 hours. The cooled reaction medium is concentrated under reduced pressure. 20 ml of water, and aqueous sodium hydroxide, to a pH in the region of 11, are added to the residue thus obtained, which is then extracted with three times 25 ml of ethyl acetate. The pooled organic phases are filtered, dried over magnesium sulfate, filtered again and concentrated by evaporation under reduced pressure. The residue thus obtained is purified by chromatography on a silica column with a dichloromethane/methanol (99/1 by volume) mixture as eluent. The solid thus obtained is recrystallized from 5 ml of isopropanol. 0.1 g of N-(3-amino-1H-indazol-5-yl)-3-fluorobenzenesulfonamide is thus obtained, after drying under reduced pressure at 60° C., in the form of a white solid melting at 216° C. (analysis C13H11FN4O2S % calculated C, 50.97; H, 3.62; F, 6.20; N, 18.29; O, 10.45; S, 10.47. % found C, 50.80; H, 3.72; N, 18.14; S, 10.21).

Workup

  1. customThe cooled reaction medium
  2. concentrationis concentrated under reduced pressure
  3. addition20 ml of water, and aqueous sodium hydroxide, to a pH in the region of 11, are added to the residue
  4. customthus obtained
  5. extractionwhich is then extracted with three times 25 ml of ethyl acetate
  6. filtrationThe pooled organic phases are filtered
  7. dry with materialdried over magnesium sulfate
  8. filtrationfiltered again
  9. concentrationconcentrated by evaporation under reduced pressure
  10. customThe residue thus obtained
  11. customis purified by chromatography on a silica column with a dichloromethane/methanol (99/1 by volume) mixture as eluent
  12. customThe solid thus obtained
  13. customis recrystallized from 5 ml of isopropanol

Sources & evidence

ORD record
ord-a4b3df32a22e46e190c5db851a5a53ed
Source dataset
uspto-grants-2005_02
Patent number
US06858638B2

Reaction notes

Loading…