Potassium Phosphate, Tribasic → 5-{[(3S)-1-(cyclopropylcarbonyl)-3-pyrrolidinyl]methyl}-4-(2',4'-dichloro-4-biphenylyl)-2,4-dihydro-3H-1,2,4-triazol-3-one

HRID 525134Notes

Reaction equation

HRID 525134 reaction equation
Br[C:2]1[CH:7]=[CH:6][C:5]([N:8]2[C:12]([CH2:13][C@@H:14]3[CH2:18][CH2:17][N:16]([C:19]([CH:21]4[CH2:23][CH2:22]4)=[O:20])[CH2:15]3)=[N:11][NH:10][C:9]2=[O:24])=[CH:4][CH:3]=1.[Cl:25][C:26]1[CH:31]=[C:30]([Cl:32])[CH:29]=[CH:28][C:27]=1B(O)O.P([O-])([O-])([O-])=O.[K+].[K+].[K+]>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>[CH:21]1([C:19]([N:16]2[CH2:17][CH2:18][C@@H:14]([CH2:13][C:12]3[N:8]([C:5]4[CH:6]=[CH:7][C:2]([C:29]5[CH:28]=[CH:27][C:26]([Cl:25])=[CH:31][C:30]=5[Cl:32])=[CH:3][CH:4]=4)[C:9](=[O:24])[NH:10][N:11]=3)[CH2:15]2)=[O:20])[CH2:23][CH2:22]1

Participants

7

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 2734659(2,4-Dichlorophenyl)boronic acidHCID 673755254-(4-bromophenyl)-5-{[(3S)-1-(cyclopropylcarbonyl)-3-pyrrolidinyl]methyl}-2,4-dihydro-3H-1,2,4-triazol-3-one

Product 1

HCID 533735535-{[(3S)-1-(cyclopropylcarbonyl)-3-pyrrolidinyl]methyl}-4-(2',4'-dichloro-4-biphenylyl)-2,4-dihydro-3H-1,2,4-triazol-3-oneYield 22.2%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 702EthanolSolvent2×HCID 962WaterSolvent

Conditions

Temperature
110 °C

Procedure

A vial was charged with a slurry of 4-(4-bromophenyl)-5-{[(3S)-1-(cyclopropylcarbonyl)-3-pyrrolidinyl]methyl}-2,4-dihydro-3H-1,2,4-triazol-3-one (100 mg, 0.256 mmol), (2,4-dichlorophenyl)boronic acid (98 mg, 0.511 mmol), tetrakis(triphenylphosphine)palladium(0) (29.5 mg, 0.026 mmol) and tripotassium phosphate (217 mg, 1.022 mmol) in ethanol (4.0 mL) and water (4.00 mL) then purged with nitrogen and sealed with a standard teflon septa (crimped aluminum seal). The reaction was heated in an aluminum block at 110° C. for 2 h. The cooled reaction was diluted with ethanol then evaporated under reduced pressure to a yellow residue. The residue was triturated from methanol and the filtered methanol layer was purified by reverse phase HPLC (LUNA C-18: 30×50 mm column; 20-70% acetonitrile w/0.1% TFA/water w/0.1% TFA). The desired product fractions were combined and evaporated in vacuo to a residue that was recrystallized from hexanes/ethyl acetate to afford the title compound as a white solid (26 mg, 21.8%). MS(ES)+ m/e 457.0, 459.2 [M+H]+, chlorine pattern.

Workup

  1. customthen purged with nitrogen
  2. customsealed with a standard teflon
  3. custom(crimped aluminum seal)
  4. customThe cooled reaction
  5. customthen evaporated under reduced pressure to a yellow residue
  6. customThe residue was triturated from methanol
  7. customthe filtered methanol layer was purified by reverse phase HPLC (LUNA C-18: 30×50 mm column; 20-70% acetonitrile w/0.1% TFA/water w/0.1% TFA)
  8. customevaporated in vacuo to a residue that
  9. customwas recrystallized from hexanes/ethyl acetate

Sources & evidence

ORD record
ord-9b3c67d208f945eaa73cd1f9d15b9445
Source dataset
uspto-grants-2016_05
Patent number
US09340529B2

Reaction notes

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