Potassium Phosphate, Tribasic → 5-(9-cyclopropyl-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepin-2-yl)-1-isopropyl-1H-1,2,4-triazol-3-amine

HRID 1629472Notes

Reaction equation

HRID 1629472 reaction equation
Br[C:2]1[CH:24]=[CH:23][C:5]2[C:6]3[N:7]([CH:11]=[C:12]([C:14]4[N:18]([CH:19]([CH3:21])[CH3:20])[N:17]=[C:16]([NH2:22])[N:15]=4)[N:13]=3)[CH2:8][CH2:9][O:10][C:4]=2[CH:3]=1.P([O-])([O-])([O-])=O.[K+].[K+].[K+].[CH:33]1(B2OC(C)(C)C(C)(C)O2)[CH2:35][CH2:34]1>C1COCC1.O.CCOC(C)=O>[CH:33]1([C:2]2[CH:24]=[CH:23][C:5]3[C:6]4[N:7]([CH:11]=[C:12]([C:14]5[N:18]([CH:19]([CH3:21])[CH3:20])[N:17]=[C:16]([NH2:22])[N:15]=5)[N:13]=4)[CH2:8][CH2:9][O:10][C:4]=3[CH:3]=2)[CH2:35][CH2:34]1

Participants

7

Reactant 3

HCID 62657Potassium Phosphate, TribasicHCID 27580152-Cyclopropyl-4,4,5,5-tetramethyl-1,3,2-dioxaborolaneHCID 582044395-(8-Bromo-4,5-dihydro-6-oxa-1,3a-diaza-benzo[e]azulen-2-yl)-1-isopropyl-1H-[1,2,4]triazol-3-ylamine

Product 1

HCID 582047355-(9-cyclopropyl-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepin-2-yl)-1-isopropyl-1H-1,2,4-triazol-3-amineYield 23.8%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
130 °C

Procedure

A microwave vial was charged with a solution of 5-(9-bromo-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4]oxazepin-2-yl)-1-isopropyl-1H-1,2,4-triazol-3-amine (100 mg, 0.200 mmol) in 0.500 ml THF and 0.300 mL water. To this solution was added potassium phosphate (164 mg, 0.770 mol) and cyclopropyl boronic acid pinacol ester (308 mg, 1.48 mol). The reaction suspension was degassed by bubbling nitrogen through the stirred mixture via a syringe. After several minutes the syringe was removed and Bis(ditertbutyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II) (20 mg, 0.026 mmol) was added and the reaction vial was quickly sealed. The sealed vial was flash heated in a microwave at 130° C. for 30 minutes. The cooled reaction was diluted with EtOAc and the organic solution was washed with water ×1, saline ×1 and dried (Na2SO4) before concentration in vacuo. The crude residue was purified by preparative RP-HPLC to give 16.7 mg of 431 (14% theoretical yield). 1H NMR (400 MHz, DMSO) δ 8.24 (d, J=8.3 Hz, 1H), 7.69 (s, 1H), 6.85 (d, J=8.4 Hz, 1H), 6.74 (s, 1H), 5.73 (dt, J=13.3, 6.8 Hz, 1H), 5.15 (s, 2H), 4.46 (d, J=2.3 Hz, 4H), 2.04-1.86 (m, 1H), 1.40 (d, J=6.6 Hz, 6H), 1.11-0.88 (m, 2H), 0.72 (q, J=4.9 Hz, 2H)

Workup

  1. customThe reaction suspension was degassed
  2. customby bubbling nitrogen through the stirred mixture via a syringe
  3. customAfter several minutes the syringe was removed
  4. customthe reaction vial was quickly sealed
  5. customThe cooled reaction
  6. washthe organic solution was washed with water ×1, saline ×1
  7. dry with materialdried (Na2SO4)
  8. concentrationbefore concentration in vacuo
  9. customThe crude residue was purified by preparative RP-HPLC

Sources & evidence

ORD record
ord-1f1348ce23f04008bfe224e3631cda2a
Source dataset
uspto-grants-2014_07
Patent number
US08785626B2

Reaction notes

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