Trifluoroacetic acid → 6-{[2-(Azetidin-3-yl)ethyl](methylsulfonyl)amino}-2-(4-chlorophenyl)-5-cyclopropyl-N-methyl-2H-indazole-3-carboxamide

HRID 2272269Notes

Reaction equation

HRID 2272269 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[C:16]([C:17](=[O:20])[NH:18][CH3:19])=[C:15]3[C:10]([CH:11]=[C:12]([N:24]([S:38]([CH3:41])(=[O:40])=[O:39])[CH2:25][CH2:26][CH:27]4[CH2:30][N:29](C(OC(C)(C)C)=O)[CH2:28]4)[C:13]([CH:21]4[CH2:23][CH2:22]4)=[CH:14]3)=[N:9]2)=[CH:4][CH:3]=1.C(O)(C(F)(F)F)=O>C(Cl)Cl>[NH:29]1[CH2:30][CH:27]([CH2:26][CH2:25][N:24]([S:38]([CH3:41])(=[O:40])=[O:39])[C:12]2[C:13]([CH:21]3[CH2:22][CH2:23]3)=[CH:14][C:15]3[C:10]([CH:11]=2)=[N:9][N:8]([C:5]2[CH:4]=[CH:3][C:2]([Cl:1])=[CH:7][CH:6]=2)[C:16]=3[C:17]([NH:18][CH3:19])=[O:20])[CH2:28]1

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 71768611tert-butyl 3-(2-{[2-(4-chlorophenyl)-5-cyclopropyl-3-(methylcarbamoyl)-2H-indazol-6-yl] (methylsulfonyl)amino}ethyl)azetidine-1-carboxylate

Product 1

HCID 717690346-{[2-(Azetidin-3-yl)ethyl](methylsulfonyl)amino}-2-(4-chlorophenyl)-5-cyclopropyl-N-methyl-2H-indazole-3-carboxamideYield 43.8%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of tert-butyl 3-(2-{[2-(4-chlorophenyl)-5-cyclopropyl-3-(methylcarbamoyl)-2H-indazol-6-yl](methylsulfonyl)amino}ethyl)azetidine-1-carboxylate (prepared by reacting 2-(4-chlorophenyl)-5-cyclopropyl-N-methyl-6-[(methylsulfonyl)amino]-2H-indazole-3-carboxamide with tert-butyl 3-(2-hydroxyethyl)azetidine-1-carboxylate), (25 mg, 0.04 mmol) in DCM (3 mL) was added TFA (1 mL) and the reaction stirred at ambient temperature. After 1 h, the reaction was concentrated in vacuo and the residue partitioned between EtOAc (25 mL) and aq. saturated sodium bicarbonate (15 mL). The organic layer was separated and the aqueous layer extracted with EtOAc (3×15 mL). The combined organics were washed with brine (15 mL), dried (MgSO4), concentrated in vacuo and purified by preparative HPLC eluting with acetonitrile:0.1% formic acid in water to afford Compound (6) (8.8 mg, 42%). ESI-MS m/z calculated for [M+H]+: 502.2. found: 502.1 1H NMR (400 MHz, CD3CN) δ 8.40 (s, 1H), 7.83 (s, 1H), 7.64-7.54 (m, 4H), 7.39 (s, 1H), 7.37 (br d, J=3.9 Hz, 1H), 3.94-3.81 (m, 2H), 3.76-3.59 (m, 2H), 3.59-3.50 (m, 2H), 3.09 (d, J=10.3 Hz, 3H), 2.97-2.86 (m, 4H), 2.43-2.33 (m, 1H), 1.95-1.86 (m, 2H), 1.14-1.00 (m, 3H), 0.71-0.59 (m, 1H).

Workup

  1. concentrationthe reaction was concentrated in vacuo
  2. customthe residue partitioned between EtOAc (25 mL) and aq. saturated sodium bicarbonate (15 mL)
  3. customThe organic layer was separated
  4. extractionthe aqueous layer extracted with EtOAc (3×15 mL)
  5. washThe combined organics were washed with brine (15 mL)
  6. dry with materialdried (MgSO4)
  7. concentrationconcentrated in vacuo
  8. custompurified by preparative HPLC
  9. washeluting with acetonitrile

Sources & evidence

ORD record
ord-0816d9c21f7a4a2cb2d183d2eb90ac80
Source dataset
uspto-grants-2015_09
Patent number
US09120775B2

Reaction notes

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