Benzyl Alcohol → Benzyl 6-((tert-butoxycarbonyl)methyl)-5-(2,4-dichlorophenyl)-7-methylimidazo[1,2-a]pyrimidine-2-carbamate

HRID 1868463Notes

Reaction equation

HRID 1868463 reaction equation
[C:1]([O:5][C:6]([CH2:8][C:9]1[C:10]([CH3:29])=[N:11][C:12]2[N:13]([CH:23]=[C:24](C(O)=O)[N:25]=2)[C:14]=1[C:15]1[CH:20]=[CH:19][C:18]([Cl:21])=[CH:17][C:16]=1[Cl:22])=[O:7])([CH3:4])([CH3:3])[CH3:2].C1C=CC(P(N=[N+]=[N-])(C2C=CC=CC=2)=[O:37])=CC=1.[C:47]1([CH2:53][OH:54])[CH:52]=[CH:51][CH:50]=[CH:49][CH:48]=1.CC[N:57]([CH2:60]C)CC>C1(C)C=CC=CC=1>[C:1]([O:5][C:6]([CH2:8][C:9]1[C:10]([CH3:29])=[N:11][C:12]2[N:13]([CH:23]=[C:24]([NH:57][C:60]([O:54][CH2:53][C:47]3[CH:52]=[CH:51][CH:50]=[CH:49][CH:48]=3)=[O:37])[N:25]=2)[C:14]=1[C:15]1[CH:20]=[CH:19][C:18]([Cl:21])=[CH:17][C:16]=1[Cl:22])=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 4

HCID 244Benzyl AlcoholHCID 8471TriethylamineHCID 199401P,P-Diphenylphosphinic azideHCID 670215506-((Tert-butoxycarbonyl)methyl)-5-(2,4-dichlorophenyl)-7-methylimidazo[1,2-a]pyrimidine-2-carboxylic acid

Product 1

HCID 67021499Benzyl 6-((tert-butoxycarbonyl)methyl)-5-(2,4-dichlorophenyl)-7-methylimidazo[1,2-a]pyrimidine-2-carbamateYield 52.8%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Conditions

Temperature
100 °C

Procedure

To a stirred solution of 6-((tert-butoxycarbonyl)methyl)-5-(2,4-dichlorophenyl)-7-methylimidazo[1,2-a]pyrimidine-2-carboxylic acid (Example 58, Step 2, 30 mg, 0.07 mmol) in PhCH3 (3 mL) was added DPPA (19 μL, 0.09 mmol), PhCH2OH (17 μL, 0.17 mmol) and Et3N (12 μL, 0.09 mmol). The reaction was heated to 100° C. for 16 h and was concentrated under reduced pressure. The resulting residue was diluted with EtOAc and extracted with satd aq NH4Cl, NaHCO3 and brine prior to drying over anhydrous MgSO4. Filtration, concentration under reduced pressure and purification by silica gel chromatography afforded benzyl 6-((tert-butoxycarbonyl)methyl)-5-(2,4-dichlorophenyl)-7-methylimidazo[1,2-a]pyrimidine-2-carbamate (20 mg, 32%).

Workup

  1. concentrationwas concentrated under reduced pressure
  2. additionThe resulting residue was diluted with EtOAc
  3. extractionextracted with satd aq NH4Cl, NaHCO3 and brine
  4. dry with materialto drying over anhydrous MgSO4
  5. filtrationFiltration, concentration
  6. customunder reduced pressure and purification by silica gel chromatography

Sources & evidence

ORD record
ord-e56a7c52264b4978a986ea9184e0cba8
Source dataset
uspto-grants-2009_12
Patent number
US07635699B2

Reaction notes

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