6-(N-(3-Chloro-4-nitrophenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamide → 6-(N-(4-Amino-3-chlorophenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamide

HRID 1424793Notes

Reaction equation

HRID 1424793 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([N:11]([C:16]2[C:35]([CH:36]3[CH2:38][CH2:37]3)=[CH:34][C:19]3[C:20]([C:30]([NH:32][CH3:33])=[O:31])=[C:21]([C:23]4[CH:28]=[CH:27][C:26]([F:29])=[CH:25][CH:24]=4)[O:22][C:18]=3[CH:17]=2)[S:12]([CH3:15])(=[O:14])=[O:13])[CH:5]=[CH:6][C:7]=1[N+:8]([O-])=O>[Pt].C1COCC1.CO>[NH2:8][C:7]1[CH:6]=[CH:5][C:4]([N:11]([C:16]2[C:35]([CH:36]3[CH2:38][CH2:37]3)=[CH:34][C:19]3[C:20]([C:30]([NH:32][CH3:33])=[O:31])=[C:21]([C:23]4[CH:24]=[CH:25][C:26]([F:29])=[CH:27][CH:28]=4)[O:22][C:18]=3[CH:17]=2)[S:12]([CH3:15])(=[O:14])=[O:13])=[CH:3][C:2]=1[Cl:1]

Participants

4

Reactant 1

HCID 1317322546-(N-(3-Chloro-4-nitrophenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamide

Product 1

HCID 1317322556-(N-(4-Amino-3-chlorophenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamideYield 99%

Reagents, catalysts & solvents 2

HCID 23939PlatinumCatalystHCID 21899815MeOH tetrahydrofuranSolvent

Procedure

A solution of 6-(N-(3-chloro-4-nitrophenyl)methylsulfonamido)-5-cyclopropyl-2-(4-fluorophenyl)-N-methylbenzofuran-3-carboxamide (11.0 g, 19.7 mmol) in 1:1 THF/MeOH (75 mL) was subjected to hydrogenation at 40 psi in the presence of 5% sulfided platinum on carbon (0.560 g). After 4 hours an additional portion of catalyst was added (0.250 g). After another 16 hours the reaction vessel was purged with nitrogen, catalyst removed by filtration through celite, and the filtrate concentrated to dryness at reduced pressure. The residue was recrystallized from hexane/EtOAc to afford the title compound (10.3 g, 99%) as a white solid. LCMS (m/z, ES+)=528 (M+H+).

Workup

  1. additionAfter 4 hours an additional portion of catalyst was added (0.250 g)
  2. customAfter another 16 hours the reaction vessel was purged with nitrogen, catalyst
  3. customremoved by filtration through celite
  4. concentrationthe filtrate concentrated to dryness at reduced pressure
  5. customThe residue was recrystallized from hexane/EtOAc

Sources & evidence

ORD record
ord-c3526514155041b6b5cc0147363ca601
Source dataset
uspto-grants-2015_01
Patent number
US08927593B2

Reaction notes

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