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(1S)-(+)-Camphor-10-sulphonic acid → 1-[1-(2-Dimethylaminoethyl)piperidin-4-yl]-1-methyl-3-{4-[4-(3-phenylacetylthioureido)phenoxy]pyridin-2-yl}urea

HRID 492972
Notes
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Reaction equation

HRID 492972 reaction equation
[NH2:1][C:2]1[CH:30]=[CH:29][C:5]([O:6][C:7]2[CH:12]=[CH:11][N:10]=[C:9]([NH:13][C:14](=[O:28])[N:15]([CH:17]3[CH2:22][CH2:21][N:20]([CH2:23][CH2:24][N:25]([CH3:27])[CH3:26])[CH2:19][CH2:18]3)[CH3:16])[CH:8]=2)=[CH:4][CH:3]=1.[C@]12(CS(O)(=O)=O)C(C)(C)C(CC1)CC2=O.[C:46]1([CH2:52][C:53]([N:55]=[C:56]=[S:57])=[O:54])[CH:51]=[CH:50][CH:49]=[CH:48][CH:47]=1.C(=O)([O-])O.[Na+]>C(O)C.C1(C)C=CC=CC=1.CCCCCC.C(OCC)C.C(OCC)(=O)C>[CH3:27][N:25]([CH3:26])[CH2:24][CH2:23][N:20]1[CH2:21][CH2:22][CH:17]([N:15]([CH3:16])[C:14]([NH:13][C:9]2[CH:8]=[C:7]([O:6][C:5]3[CH:4]=[CH:3][C:2]([NH:1][C:56]([NH:55][C:53](=[O:54])[CH2:52][C:46]4[CH:47]=[CH:48][CH:49]=[CH:50][CH:51]=4)=[S:57])=[CH:30][CH:29]=3)[CH:12]=[CH:11][N:10]=2)=[O:28])[CH2:18][CH2:19]1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

10

Reactant 4

HCID 218580(1S)-(+)-Camphor-10-sulphonic acidHCID 516892Sodium BicarbonateHCID 12454157Phenylacetyl isothiocyanateHCID 231531743-[4-(4-Aminophenoxy)pyridin-2-yl]-1-[1-(2-dimethylaminoethyl)piperidin-4-yl]-1-methylurea

Product 1

HCID 576773821-[1-(2-Dimethylaminoethyl)piperidin-4-yl]-1-methyl-3-{4-[4-(3-phenylacetylthioureido)phenoxy]pyridin-2-yl}urea
Yield 42%

Reagents, catalysts & solvents 5

HCID 702EthanolSolventHCID 1140TolueneSolventHCID 3283Diethyl EtherSolventHCID 8058HexaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 3-[4-(4-aminophenoxy)pyridin-2-yl]-1-[1-(2-dimethylaminoethyl)piperidin-4-yl]-1-methylurea (96 mg) in ethanol (5.0 ml) was added (1S)-(+)-10-camphorsulfonic acid (103 mg), followed by stirring at room temperature for 15 min. A solution of 2-phenylacetyl isothiocyanate in toluene (0.25 M, 2.80 ml) was added to the reaction mixture, followed by stirring at room temperature for 4 hrs. Ethyl acetate (50 ml) and a saturated aqueous solution of sodium hydrogencarbonate (20 ml) were added to the reaction mixture, and the organic layer was separated. The aqueous layer was extracted with ethyl acetate. The combined organic layer was washed with brine, and dried over anhydrous sodium sulfate. The organic layer was concentrated to give a residue, which was then purified by silica gel column chromatography (FUJI Silysia NH, eluent; ethyl acetate, then ethyl acetate:methanol=20:1). Fractions containing a target compound were concentrated to give a residue, to which diethyl ether (5 ml) and hexane (25 ml) were added to give a precipitate. The precipitate was suspended in the solvent. Then the precipitate was filtered off, washed with diethyl ether, and dried under aeration to provide the titled compound (57.4 mg, 42%) as white powder.

Workup

  1. stirringby stirring at room temperature for 4 hrs
  2. customthe organic layer was separated
  3. extractionThe aqueous layer was extracted with ethyl acetate
  4. washThe combined organic layer was washed with brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. concentrationThe organic layer was concentrated
  7. customto give a residue, which
  8. customwas then purified by silica gel column chromatography (FUJI Silysia NH, eluent
  9. additionFractions containing a target compound
  10. concentrationwere concentrated
  11. customto give a residue
  12. customto give a precipitate
  13. filtrationThen the precipitate was filtered off
  14. washwashed with diethyl ether
  15. customdried under aeration

Sources & evidence

ORD record
ord-05c46daaff8c4e2f9b64284cde495135
Source dataset
uspto-grants-2009_05
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07531532B2

Reaction notes

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