Potassium Phosphate, Tribasic → 2-Ethyl-3-{5-[4-[(1-methylethyl)oxy]-3-(trifluoromethyl)phenyl]-1,3,4-thiadiazol-2-yl}benzaldehyde

HRID 1942585Notes

Reaction equation

HRID 1942585 reaction equation
Br[C:2]1[S:3][C:4]([C:7]2[CH:12]=[CH:11][C:10]([O:13][CH:14]([CH3:16])[CH3:15])=[C:9]([C:17]([F:20])([F:19])[F:18])[CH:8]=2)=[N:5][N:6]=1.[CH2:21]([C:23]1[C:30](B2OC(C)(C)C(C)(C)O2)=[CH:29][CH:28]=[CH:27][C:24]=1[CH:25]=[O:26])[CH3:22].P([O-])([O-])([O-])=O.[K+].[K+].[K+]>CN(C)C=O.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>[CH2:21]([C:23]1[C:30]([C:2]2[S:3][C:4]([C:7]3[CH:12]=[CH:11][C:10]([O:13][CH:14]([CH3:16])[CH3:15])=[C:9]([C:17]([F:20])([F:19])[F:18])[CH:8]=3)=[N:5][N:6]=2)=[CH:29][CH:28]=[CH:27][C:24]=1[CH:25]=[O:26])[CH3:22]

Participants

7

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 584940852-Ethyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzaldehydeHCID 669817782-Bromo-5-[4-[(1-methylethyl)oxy]-3-(trifluoromethyl)phenyl]-1,3,4-thiadiazole

Product 1

HCID 866589982-Ethyl-3-{5-[4-[(1-methylethyl)oxy]-3-(trifluoromethyl)phenyl]-1,3,4-thiadiazol-2-yl}benzaldehydeYield 52.7%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent2×HCID 6228DimethylformamideSolvent

Conditions

Temperature
130 °C

Procedure

To a solution of 2-bromo-5-[4-[(1-methylethyl)oxy]-3-(trifluoromethyl)phenyl]-1,3,4-thiadiazole (D4) (100 mg), 2-ethyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzaldehyde (D5) (85 mg) and tripotassium phosphate (145 mg) in N,N-dimethylformamide (DMF) (6 mL) and water (1.5 mL) stirred under nitrogen at room temperature was added Pd(Ph3P)4 (31.5 mg). The reaction vessel was sealed and heated under microwave at 130° C. for 8 min. After cooling the reaction, water was added to quench the reaction. After filtered through the celite, the filtrate was partitioned between the organic and aqueous layers. The aqueous layer was extracted with EA for 3 times. The combined organic layers were washed with brine, dried over anhydrous sodium sulfate. The dried solution was concentrated, and purified by column chromatography to afford 2-ethyl-3-{5-[4-[(1-methylethyl)oxy]-3-(trifluoromethyl)phenyl]-1,3,4-thiadiazol-2-yl}benzaldehyde (D6) (60.4 mg). MS (ES): C21H19F3N2O2S requires 420. found 421.1 (M+H+).

Workup

  1. customThe reaction vessel was sealed
  2. temperatureAfter cooling
  3. additionwas added
  4. customto quench
  5. customthe reaction
  6. filtrationAfter filtered through the celite
  7. customthe filtrate was partitioned between the organic and aqueous layers
  8. extractionThe aqueous layer was extracted with EA for 3 times
  9. washThe combined organic layers were washed with brine
  10. dry with materialdried over anhydrous sodium sulfate
  11. concentrationThe dried solution was concentrated
  12. custompurified by column chromatography

Sources & evidence

ORD record
ord-604cb6c9d500497ea86d9e96277ea43b
Source dataset
uspto-grants-2013_03
Patent number
US08389508B2

Reaction notes

Loading…