Sodium Carbonate → 2-(cis-2,6-Dimethyl-morpholin-4-yl)-5-(2,6-dimethyl-pyridin-4-yl)-thiazole-4-carbonitrile

HRID 473977Notes

Reaction equation

HRID 473977 reaction equation
Br[C:2]1[S:6][C:5]([N:7]2[CH2:12][C@H:11]([CH3:13])[O:10][C@H:9]([CH3:14])[CH2:8]2)=[N:4][C:3]=1[C:15]#[N:16].[CH3:17][C:18]1[CH:23]=[C:22](B(O)O)[CH:21]=[C:20]([CH3:27])[N:19]=1.O1CCOCC1.C(=O)([O-])[O-].[Na+].[Na+]>C(O)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>[CH3:14][C@H:9]1[O:10][C@@H:11]([CH3:13])[CH2:12][N:7]([C:5]2[S:6][C:2]([C:22]3[CH:21]=[C:20]([CH3:27])[N:19]=[C:18]([CH3:17])[CH:23]=3)=[C:3]([C:15]#[N:16])[N:4]=2)[CH2:8]1

Participants

7

Reactant 4

HCID 10340Sodium CarbonateHCID 312751,4-DioxaneHCID 23546910(2,6-Dimethylpyridin-4-yl)boronic acidHCID 672167795-Bromo-2-(cis-2,6-dimethyl-morpholin-4-yl)-thiazole-4-carbonitrile

Product 1

HCID 672165242-(cis-2,6-Dimethyl-morpholin-4-yl)-5-(2,6-dimethyl-pyridin-4-yl)-thiazole-4-carbonitrileYield 85%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 19096565Water ethanolSolvent

Conditions

Temperature
130 °C

Procedure

A mixture of Intermediate 3 (20 g, 66.18 mmol), 2,6-dimethylpyridine-4-boronic acid, pinacol ester ([325142-95-8], 20 g, 85.79 mmol), tetrakis(triphenylphosphine)palladium (4.59 g, 3.97 mmol), 1,4-dioxane (120 mL), sodium carbonate (21.04 g, 198.55 mmol) in ethanol/water 1/1 (120 mL) was stirred and heated under nitrogen atmosphere at 130° C. for 6 h. The solvent was evaporated. The residue was taken up in DCM and washed twice with water. The organic layer was separated, dried with MgSO4 and evaporated. The residue was purified by column chromatography on silica gel (eluent gradient from 100% DCM to 98/2 DCM/MeOH). The desired fractions were collected and evaporated. The resulting residue was recrystallized from DIPE/CH3CN, yielding 18.5 g (85%) of Intermediate 4, after drying overnight under vacuum at 50° C.

Workup

  1. customThe solvent was evaporated
  2. washwashed twice with water
  3. customThe organic layer was separated
  4. dry with materialdried with MgSO4
  5. customevaporated
  6. customThe residue was purified by column chromatography on silica gel (eluent gradient from 100% DCM to 98/2 DCM/MeOH)
  7. customThe desired fractions were collected
  8. customevaporated
  9. customThe resulting residue was recrystallized from DIPE/CH3CN

Sources & evidence

ORD record
ord-f365e2cdb89142419e38feabb3eed020
Source dataset
uspto-grants-2014_01
Patent number
US08637510B2

Reaction notes

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