Chlorosuccinimide → methyl 6-((6-chloro-2-cyclopropyl-1-(1-ethyl-1H-pyrazol-4-yl)-7-fluoro-1H-indol-3-yl)thio)picolinate

HRID 522778Notes

Reaction equation

HRID 522778 reaction equation
[SH:1][C:2]1[N:7]=[C:6]([C:8]([O:10][CH3:11])=[O:9])[CH:5]=[CH:4][CH:3]=1.C1C(=O)N(Cl)C(=O)C1.[Cl:20][C:21]1[C:29]([F:30])=[C:28]2[C:24]([CH:25]=[C:26]([CH:38]3[CH2:40][CH2:39]3)[N:27]2[C:31]2[CH:32]=[N:33][N:34]([CH2:36][CH3:37])[CH:35]=2)=[CH:23][CH:22]=1>C(Cl)Cl>[Cl:20][C:21]1[C:29]([F:30])=[C:28]2[C:24]([C:25]([S:1][C:2]3[N:7]=[C:6]([C:8]([O:10][CH3:11])=[O:9])[CH:5]=[CH:4][CH:3]=3)=[C:26]([CH:38]3[CH2:40][CH2:39]3)[N:27]2[C:31]2[CH:32]=[N:33][N:34]([CH2:36][CH3:37])[CH:35]=2)=[CH:23][CH:22]=1

Participants

5

Reactant 3

HCID 31398ChlorosuccinimideHCID 1181041966-chloro-2-cyclopropyl-1-(1-ethyl-1H-pyrazol-4-yl)-7-fluoro-1H-indoleHCID 178498017HCID 178498017, compound

Product 1

HCID 118104201methyl 6-((6-chloro-2-cyclopropyl-1-(1-ethyl-1H-pyrazol-4-yl)-7-fluoro-1H-indol-3-yl)thio)picolinateYield 32.2%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent3×

Procedure

To a stirred solution of methyl 6-mercaptopicolinate 6 (3.15 g, crude) in CH2Cl2 (50 mL) under inert atmosphere was added NCS (2.49 g, 18.63 mmol) at RT and stirred for 1 h. To this, indole 5 (5.6 g, 18.47 mmol) in CH2Cl2 (50 mL) was added at RT and stirred for 16 h. After completion of the reaction (TLC), the reaction mixture was diluted CH2Cl2 (100 mL) washed with water (3×100 mL). The organic extract was dried over Na2SO4, filtered and concentrated under reduced pressure to obtain the crude. The crude was purified (silica gel column chromatography; 10% EtOAc/hexanes) to afford 9 (2.8 g, 32%) as a pale brown solid. 1H NMR (500 MHz, DMSO-d6): δ 7.79 (d, J=7.5 Hz, 1H), 7.66 (d, J=10.5 Hz, 2H), 7.51 (t, J=7.5 Hz, 1H), 7.19 (d, J=8.5 Hz, 1H), 7.10-7.07 (m, 1H), 6.78 (d, J=8.0 Hz, 1H), 4.28 (q, 2H), 4.00 (s, 3H), 1.75-1.69 (m, 1H), 1.58 (t, J=7.0 Hz, 3H), 1.09-1.08 (m, 2H), 0.87-0.84 (m, 2H); LC-MS: 98.4%; m/z 471.4 (M+H+); (column; X-select CSH C-18, (50×3.0 mm, 3.5 μm); RT 4.25 min. 5.0 mM NH4OAc (Aq): ACN; 0.8 mL/min); HPLC: 98.1%; (column: Acquity BEH C-18 (50×2.1 mm, 1.7μ); RT 3.02 min. ACN: 0.025% TFA (aq); 0.5 mL/min).

Workup

  1. stirringstirred for 16 h
  2. customAfter completion of the reaction (TLC)
  3. washwashed with water (3×100 mL)
  4. extractionThe organic extract
  5. dry with materialwas dried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated under reduced pressure
  8. customto obtain the crude
  9. customThe crude was purified (silica gel column chromatography; 10% EtOAc/hexanes)

Sources & evidence

ORD record
ord-792cb480c51249a0b056b619e76165cf
Source dataset
uspto-grants-2016_05
Patent number
US09334261B2

Reaction notes

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