Dimethylformamide → tert-Butyl 5-bromo-3-{(1S)-1-[2-chloro-6-(difluoromethoxy)-3-fluorophenyl]ethyl}-1H-pyrrolo[2,3-b]pyridine-1-carboxylate

HRID 2095697Notes

Reaction equation

HRID 2095697 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]2[C:10]([C@@H:11]([C:13]3[C:18]([OH:19])=[CH:17][CH:16]=[C:15]([F:20])[C:14]=3[Cl:21])[CH3:12])=[CH:9][N:8]([C:22]([O:24][C:25]([CH3:28])([CH3:27])[CH3:26])=[O:23])[C:5]2=[N:6][CH:7]=1.C(OC(=O)[C:33](Cl)([F:35])[F:34])C.C([O-])([O-])=O.[K+].[K+].CN(C=O)C>>[Br:1][C:2]1[CH:3]=[C:4]2[C:10]([C@@H:11]([C:13]3[C:18]([O:19][CH:33]([F:35])[F:34])=[CH:17][CH:16]=[C:15]([F:20])[C:14]=3[Cl:21])[CH3:12])=[CH:9][N:8]([C:22]([O:24][C:25]([CH3:27])([CH3:26])[CH3:28])=[O:23])[C:5]2=[N:6][CH:7]=1

Participants

5

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 67843Acetic acid, 2-chloro-2,2-difluoro-, ethyl esterHCID 67003938tert-butyl 5-bromo-3-[(1S)-1-(2-chloro-3-fluoro-6-hydroxyphenyl)ethyl]-1H-pyrrolo[2,3-b]pyridine-1-carboxylate

Product 1

HCID 67003931tert-Butyl 5-bromo-3-{(1S)-1-[2-chloro-6-(difluoromethoxy)-3-fluorophenyl]ethyl}-1H-pyrrolo[2,3-b]pyridine-1-carboxylate

Conditions

Temperature
70 °C

Procedure

A mixture of tert-butyl 5-bromo-3-[(1S)-1-(2-chloro-3-fluoro-6-hydroxyphenyl)ethyl]-1H-pyrrolo[2,3-b]pyridine-1-carboxylate (1.00 g, 2.13 mmol), chlorodifluoroacetic acid ethyl ester (2.700 mL, 21.29 mmol), K2CO3 (882.7 mg, 6.387 mmol) and DMF (40 mL, 500 mmol) was heated to 70° C. for 6 h in a sealed tube. The material was extracted with EtOAc, and washed with water (3×). The organic layer was purified via column chromatography, eluting with 3-10% EtOAc/hexanes. The fractions containing the pure product were concentrated in vacuo to afford the title compound as a light yellow solid. 1H NMR (400 MHz, CD3OD): δ=1.67-1.69 (m, 9H), 1.80 (d, J=7.1 Hz, 3H), 4.94-5.03 (m, 1H), 6.63 (s, 1H), 7.15 (dd, J=9.1, 4.5 Hz, 1H), 7.22-7.28 (m, 1H), 7.55 (d, J=2.0 Hz, 1H), 7.70 (d, J=1.5 Hz, 1H), 8.34 (d, J=2.0 Hz, 1H). MS (ES+): m/z=519.03/521.03 (75/100) [MH+]. HPLC: tR=1.93 min (polar—3 min, UPLC-ACQUITY).

Workup

  1. extractionThe material was extracted with EtOAc
  2. washwashed with water (3×)
  3. customThe organic layer was purified via column chromatography
  4. washeluting with 3-10% EtOAc/hexanes
  5. additionThe fractions containing the pure product
  6. concentrationwere concentrated in vacuo

Sources & evidence

ORD record
ord-71e2395a9f0549dd990aab1ea8700d0d
Source dataset
uspto-grants-2013_05
Patent number
US08445510B2

Reaction notes

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