Hydrochloric Acid → 2-[N-(4-amidinophenyl)aminomethyl]benzothiazole-5-carboxylic acid-N-phenyl-N-(2-ethoxycarbonylethyl)amide

HRID 2288340Notes

Reaction equation

HRID 2288340 reaction equation
[C:1]1([N:7]([CH2:29][CH2:30][C:31]([O:33][CH2:34][CH3:35])=[O:32])[C:8]([C:10]2[CH:11]=[CH:12][C:13]3[S:17][C:16]([CH2:18][NH:19][C:20]4[CH:25]=[CH:24][C:23]([C:26]#[N:27])=[CH:22][CH:21]=4)=[N:15][C:14]=3[CH:28]=2)=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.Cl.C(=O)([O-])[O-].[NH4+:41].[NH4+]>C(O)C>[C:1]1([N:7]([CH2:29][CH2:30][C:31]([O:33][CH2:34][CH3:35])=[O:32])[C:8]([C:10]2[CH:11]=[CH:12][C:13]3[S:17][C:16]([CH2:18][NH:19][C:20]4[CH:25]=[CH:24][C:23]([C:26](=[NH:41])[NH2:27])=[CH:22][CH:21]=4)=[N:15][C:14]=3[CH:28]=2)=[O:9])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 517111Ammonium CarbonateHCID 184124402-[N-(4-cyanophenyl)aminomethyl]benzothiazole-5-carboxylic acid-N-phenyl-N-(2-ethoxycarbonylethyl)amide

Product 1

HCID 184123862-[N-(4-amidinophenyl)aminomethyl]benzothiazole-5-carboxylic acid-N-phenyl-N-(2-ethoxycarbonylethyl)amide

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

1.1 g (2.27 mMol) of 2-[N-(4-cyanophenyl)-aminomethyl]-benzothiazole-5-carboxylic acid-N-phenyl-N-(2-ethoxycarbonylethyl)-amide was stirred in 100 ml of ethanol saturated with hydrogen chloride for 5 hours first at 0° C. and then at room temperature until no more starting material could be detected by thin layer chromatography. Then the solvent was distilled off at a maximum bath temperature of 30° C. and the oily residue was taken up in 100 ml of absolute ethanol and mixed with 1.6 g (22 mMol) of ammonium carbonate. After 18 hours stirring at room temperature the solvent was distilled off in vacuo and the crude product was purified by flash chromatography (silica gel; gradient: water/methanol=19:1 to 4:1). When the eluates are evaporated down the desired compound is obtained as a white foam. Yield: 0.77 g (63% of theory), Rf value: 0.19 (silica gel; dichloromethane/ethanol=3:7) C27H27N5O3S (501.60) Mass spectrum: (M+H)+ =502

Workup

  1. customat room temperature
  2. distillationThen the solvent was distilled off at a maximum bath temperature of 30° C.
  3. distillationwas distilled off in vacuo
  4. customthe crude product was purified by flash chromatography (silica gel; gradient: water/methanol=19:1 to 4:1)
  5. customWhen the eluates are evaporated down the desired compound
  6. customis obtained as a white foam

Sources & evidence

ORD record
ord-e1b1bd5975844827963c710453c60238
Source dataset
uspto-grants-2000_07
Patent number
US06087380

Reaction notes

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