Sodium Carbonate → (S)-isopropyl 2-(tert-butoxy)-2-(5-(4-(4-fluorophenethoxy)phenyl)-4-(3-isopropylazetidin-1-yl)-2,6-dimethylpyridin-3-yl)acetate

HRID 718385Notes

Reaction equation

HRID 718385 reaction equation
Br[C:2]1[C:3]([N:22]2[CH2:25][CH:24]([CH:26]([CH3:28])[CH3:27])[CH2:23]2)=[C:4]([C@H:10]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])[C:11]([O:13][CH:14]([CH3:16])[CH3:15])=[O:12])[C:5]([CH3:9])=[N:6][C:7]=1[CH3:8].[F:29][C:30]1[CH:47]=[CH:46][C:33]([CH2:34][CH2:35][O:36][C:37]2[CH:42]=[CH:41][C:40](B(O)O)=[CH:39][CH:38]=2)=[CH:32][CH:31]=1.C(=O)([O-])[O-].[Na+].[Na+]>O1CCOCC1.O.CCOC(C)=O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[C:18]([O:17][C@@H:10]([C:4]1[C:5]([CH3:9])=[N:6][C:7]([CH3:8])=[C:2]([C:40]2[CH:39]=[CH:38][C:37]([O:36][CH2:35][CH2:34][C:33]3[CH:32]=[CH:31][C:30]([F:29])=[CH:47][CH:46]=3)=[CH:42][CH:41]=2)[C:3]=1[N:22]1[CH2:25][CH:24]([CH:26]([CH3:28])[CH3:27])[CH2:23]1)[C:11]([O:13][CH:14]([CH3:16])[CH3:15])=[O:12])([CH3:21])([CH3:20])[CH3:19]

Participants

8

Reactant 3

HCID 10340Sodium CarbonateHCID 118307742(S)-isopropyl 2-(5-bromo-4-(3-isopropylazetidin-1-yl)-2,6-dimethylpyridin-3-yl)-2-(tert-butoxy)acetateHCID 123643410(4-(4-Fluorophenethoxy)phenyl)boronic acid

Product 1

HCID 118307787(S)-isopropyl 2-(tert-butoxy)-2-(5-(4-(4-fluorophenethoxy)phenyl)-4-(3-isopropylazetidin-1-yl)-2,6-dimethylpyridin-3-yl)acetateYield 78%

Reagents, catalysts & solvents 4

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolventHCID 8857Ethyl AcetateSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
90 °C

Procedure

The Pd(Ph3P)4 (38.1 mg, 0.033 mmol) was added to a nitrogen purged and degassed solution of (S)-isopropyl 2-(5-bromo-4-(3-isopropylazetidin-1-yl)-2,6-dimethylpyridin-3-yl)-2-(tert-butoxy)acetate (150 mg, 0.33 mmol), (4-(4-fluorophenethoxy)phenyl)boronic acid (94 mg, 0.36 mmol), and sodium carbonate (209 mg, 1.98 mmol) in dioxane (4.5 mL) and water (0.9 mL) and stirred in a screw-capped pressure vessel for 4 h at 90° C. The reaction was allowed to cool, diluted with EtOAc, and the organic layer was washed with brine and dried (Na2SO4). The crude product was charged (DCM) to a 24 g ISCO silica gel cartridge and gradient elution (5-75% EtOAc/hexanes) using an Isolera chromatography station gave (S)-isopropyl 2-(tert-butoxy)-2-(5-(4-(4-fluorophenethoxy)phenyl)-4-(3-isopropylazetidin-1-yl)-2,6-dimethylpyridin-3-yl)acetate 152 mg (78%) as a mixture of diastereomers. 1H NMR (500 MHz, DMSO-d6) δ 7.39-7.36 (m, 2H), 7.31-7.30 (m, 1H), 7.14 (t, J=8.8 Hz, 2H), 7.00 (d, J=8.8 Hz, 1H), 6.94 (d, J=8.4 Hz, 1H), 6.82-6.80 (m, 1H), 5.18 (s, 1H), 5.03-4.98 (m, 1H), 4.21 (t, J=6.6 Hz, 2H), 3.43-3.25 (series m, 4H), 3.05 (t, J=6.6 Hz, 2H), 2.27 (s, 3H), 2.01 (s, 3H), 2.01-1.98 (m, 1H), 1.48-1.44 (m, 1H), 1.21-1.19 (m, 6H), 1.10 (s, 9H), 0.68 (d, J=6.6 Hz, 3H), 0.63 (d, J=6.6 Hz, 3H). UPLC (M+H)=591.6.

Workup

  1. custompurged
  2. temperatureto cool
  3. washthe organic layer was washed with brine
  4. dry with materialdried (Na2SO4)
  5. additionThe crude product was charged (DCM)
  6. washto a 24 g ISCO silica gel cartridge and gradient elution (5-75% EtOAc/hexanes)

Sources & evidence

ORD record
ord-c35198057da541718efde7bba139e46f
Source dataset
uspto-grants-2015_11
Patent number
US09193720B2

Reaction notes

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