Potassium Carbonate → 1-methylethyl ((2S,4R)-1-acetyl-6-{1-[2-({[(1,1-dimethylethyl)oxy]carbonyl}amino)ethyl]-1H-imidazol-4-yl}-2-methyl-1,2,3,4-tetrahydro-4-quinolinyl)carbamate

HRID 2366875Notes

Reaction equation

HRID 2366875 reaction equation
[CH3:1][CH:2]([O:4][C:5](=[O:30])[NH:6][C@H:7]1[C:16]2[C:11](=[CH:12][CH:13]=[C:14](B3OC(C)(C)C(C)(C)O3)[CH:15]=2)[N:10]([C:26](=[O:28])[CH3:27])[C@@H:9]([CH3:29])[CH2:8]1)[CH3:3].CC([N:35]([CH2:39][CH2:40][N:41]1[CH:45]=[C:44](I)[N:43]=[CH:42]1)[C:36](=[O:38])[O-:37])(C)C.C(=O)([O-])[O-].[K+].[K+]>C1(C)C=CC=CC=1.C(O)C.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>[CH3:1][CH:2]([O:4][C:5](=[O:30])[NH:6][C@H:7]1[C:16]2[C:11](=[CH:12][CH:13]=[C:14]([C:44]3[N:43]=[CH:42][N:41]([CH2:40][CH2:39][NH:35][C:36]([O:37][C:16]([CH3:11])([CH3:7])[CH3:15])=[O:38])[CH:45]=3)[CH:15]=2)[N:10]([C:26](=[O:28])[CH3:27])[C@@H:9]([CH3:29])[CH2:8]1)[CH3:3]

Participants

7

Reactant 3

HCID 11430Potassium Carbonate2×HCID 681853941-Methylethyl [(cis)-1-acetyl-2-methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,4-tetrahydro-4-quinolinyl]carbamateHCID 1317313251,1-dimethylethyl[2-(4-iodo-1H-imidazol-1-yl)ethyl]carbamate

Product 1

HCID 681854051-methylethyl ((2S,4R)-1-acetyl-6-{1-[2-({[(1,1-dimethylethyl)oxy]carbonyl}amino)ethyl]-1H-imidazol-4-yl}-2-methyl-1,2,3,4-tetrahydro-4-quinolinyl)carbamateYield 12%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalyst2×HCID 702EthanolSolventHCID 1140TolueneSolvent

Procedure

A mixture of 1-methylethyl[(2S,4R)-1-acetyl-2-methyl-6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1,2,3,4-tetrahydro-4-quinolinyl]carbamate (for a preparation see Intermediate 52) (333 mg, 0.80 mmol), 1,1-dimethylethyl[2-(4-iodo-1H-imidazol-1-yl)ethyl]carbamate (for a preparation see Intermediate 80) (270 mg, 0.8 mmol), potassium carbonate (443 mg, 3.2 mmol) and tetrakis(triphenylphosphine)palladium(0) (46 mg, 0.040 mmol) in toluene (10 ml) and ethanol (10 ml) was refluxed under nitrogen for 16 h then cooled to room temperature and the insoluble were filtered off. Potassium carbonate (443 mg, 3.2 mmol) and tetrakis(triphenylphosphine)palladium(0) (46 mg, 0.040 mmol) were added to the filtrate and the resulting mixture refluxed for 7 h then cooled to room temperature and the insoluble filtered off. The resulting solution was concentrated in vacuo. Purification of the residue by flash chromatography on silica gel (gradient: 0 to 6% MeOH in DCM) gave 1-methylethyl((2S,4R)-1-acetyl-6-{1-[2-({[(1,1-dimethylethyl)oxy]carbonyl}amino)ethyl]-1H-imidazol-4-yl}-2-methyl-1,2,3,4-tetrahydro-4-quinolinyl)carbamate (47 mg, 0.094 mmol, 12%) as a light brown solid.

Workup

  1. temperaturewas refluxed under nitrogen for 16 h
  2. filtrationthe insoluble were filtered off
  3. temperaturethe resulting mixture refluxed for 7 h
  4. temperaturethen cooled to room temperature
  5. concentrationThe resulting solution was concentrated in vacuo
  6. customPurification of the residue by flash chromatography on silica gel (gradient: 0 to 6% MeOH in DCM)

Sources & evidence

ORD record
ord-d58d5a6c4db1414795bb17103fd7084a
Source dataset
uspto-grants-2014_04
Patent number
US08697725B2

Reaction notes

Loading…