Potassium Carbonate → (S)-3-{4-[2-(4-Cyano-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-6-ylmethoxy]-phenyl}-hex-4-ynoic acid ethyl ester

HRID 2272837Notes

Reaction equation

HRID 2272837 reaction equation
Br[C:2]1[N:28]=[C:5]2[CH:6]=[CH:7][C:8]([CH2:10][O:11][C:12]3[CH:17]=[CH:16][C:15]([C@@H:18]([C:25]#[C:26][CH3:27])[CH2:19][C:20]([O:22][CH2:23][CH3:24])=[O:21])=[CH:14][CH:13]=3)=[CH:9][N:4]2[N:3]=1.CC1(C)C(C)(C)OB([C:37]2[CH:44]=[CH:43][C:40]([C:41]#[N:42])=[CH:39][CH:38]=2)O1.C([O-])([O-])=O.[K+].[K+]>O1CCOCC1.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>[CH2:23]([O:22][C:20](=[O:21])[CH2:19][C@@H:18]([C:15]1[CH:16]=[CH:17][C:12]([O:11][CH2:10][C:8]2[CH:7]=[CH:6][C:5]3[N:4]([N:3]=[C:2]([C:37]4[CH:44]=[CH:43][C:40]([C:41]#[N:42])=[CH:39][CH:38]=4)[N:28]=3)[CH:9]=2)=[CH:13][CH:14]=1)[C:25]#[C:26][CH3:27])[CH3:24]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 27346254-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)benzonitrileHCID 118151365Ethyl (3S)-3-[4-[(2-bromo-[1,2,4]triazolo[1,5-a]pyridin-6-yl)methoxy]phenyl]hex-4-ynoate

Product 1

HCID 118130002(S)-3-{4-[2-(4-Cyano-phenyl)-[1,2,4]triazolo[1,5-a]pyridin-6-ylmethoxy]-phenyl}-hex-4-ynoic acid ethyl esterYield 73.2%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 312751,4-DioxaneSolvent

Conditions

Temperature
100 °C

Procedure

To a stirred solution of ethyl (3S)-3-[4-[(2-bromo-[1,2,4]triazolo[1,5-a]pyridin-6-yl)methoxy]phenyl]hex-4-ynoate (0.25 g, 0.57 mmol) and 4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-benzonitrile (0.14 g, 0.5 mmol) in dioxane (115 mL) is added K2CO3 (0.15 g, 1.134 mmol). The mixture is purged with argon for 30 minutes, Pd(PPh3)4 (0.032 g, 0.027 mmol) is added and the mixture is heated at 100° C. for 5 hours. The reaction mixture is cooled to room temperature, filtered through diatomaceous earth. The filtrate is evaporated under reduced pressure and concentrated to dryness. The crude material is purified by silica gel chromatography (combiflash) eluting with 30% EtOAc/hexane to give the title compound as a brown liquid (0.170 g, 68.75%). LCMS m/z 464 (M+H).

Workup

  1. customThe mixture is purged with argon for 30 minutes
  2. temperatureThe reaction mixture is cooled to room temperature
  3. filtrationfiltered through diatomaceous earth
  4. customThe filtrate is evaporated under reduced pressure
  5. concentrationconcentrated to dryness
  6. customThe crude material is purified by silica gel chromatography (combiflash)
  7. washeluting with 30% EtOAc/hexane

Sources & evidence

ORD record
ord-0418d728dc114017b4a0f4d0e2cec576
Source dataset
uspto-grants-2015_09
Patent number
US09120793B2

Reaction notes

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