Triethylamine → (R)-1-(4-(2-(2-fluoro-6-hydroxyphenyl)-7-methylquinazolin-4-yl)piperazin-1-yl)-2-hydroxy-4-methylpentan-1-one

HRID 2079308Notes

Reaction equation

HRID 2079308 reaction equation
Cl[C:2]1[C:11]2[C:6](=[CH:7][C:8]([CH3:12])=[CH:9][CH:10]=2)[N:5]=[C:4]([C:13]2[C:18]([F:19])=[CH:17][CH:16]=[CH:15][C:14]=2[OH:20])[N:3]=1.[OH:21][C@H:22]([CH2:31][CH:32]([CH3:34])[CH3:33])[C:23]([N:25]1[CH2:30][CH2:29][NH:28][CH2:27][CH2:26]1)=[O:24].C(N(CC)CC)C>C(Cl)Cl>[F:19][C:18]1[CH:17]=[CH:16][CH:15]=[C:14]([OH:20])[C:13]=1[C:4]1[N:3]=[C:2]([N:28]2[CH2:27][CH2:26][N:25]([C:23](=[O:24])[C@H:22]([OH:21])[CH2:31][CH:32]([CH3:33])[CH3:34])[CH2:30][CH2:29]2)[C:11]2[C:6](=[CH:7][C:8]([CH3:12])=[CH:9][CH:10]=2)[N:5]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 59216548(R)-2-hydroxy-4-methyl-1-(piperazin-1-yl)pentan-1-oneHCID 1361213752-(4-Chloro-7-methylquinazolin-2-yl)-3-fluorophenol

Product 1

HCID 135453120(R)-1-(4-(2-(2-fluoro-6-hydroxyphenyl)-7-methylquinazolin-4-yl)piperazin-1-yl)-2-hydroxy-4-methylpentan-1-one

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

2-(4-Chloro-7-methylquinazolin-2-yl)-3-fluorophenol (300 mg, 1.04 mmol) in CH2Cl2 (5 mL) was cooled using an ice water batch. To this stirring solution was added (R)-2-hydroxy-4-methyl-1-(piperazin-1-yl)pentan-1-one (312 mg, 1.56 mmol), followed by triethylamine (210 mg, 291 μL, 2.08 mmol). After letting the reaction warn to room temperature, it was stirred overnight. The mixture was partitioned between water and CH2Cl2 and separated, and the aqueous layer was extracted with CH2Cl2. The combined organic layers were dried over Na2SO4, filtered, and concentrated to a viscous yellow oil. Purification via silica gel chromatography using 0-30% EtOAc in CH2Cl2/hexanes (2:1) gave (R)-1-(4-(2-(2-fluoro-6-hydroxyphenyl)-7-methylquinazolin-4-yl)piperazin-1-yl)-2-hydroxy-4-methylpentan-1-one as a bright yellow foam/solid. (413 mg, 88%). LC/MS: m/z 453.1 (M+H)+ at 2.44 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)). 1H NMR (400 MHz, DMSO-d6) d 8.01 (d, J=8.5 Hz, 1H), 7.68 (s, 1H), 7.42 (d, J=8.5 Hz, 1H), 7.37-7.32 (m, 1H), 6.80 (d, J=8.3 Hz, 1H), 6.76-6.71 (m, 1H), 4.91 (d, J=7.2 Hz, 1H), 4.40-4.35 (m, 1H), 4.02-3.65 (m, 8H), 2.52 (s, 3H), 1.82-1.73 (m, 1H), 1.47-1.34 (m, 2H), 0.91 (dd, J=6.5, 4.1 Hz, 6H) ppm.

Workup

  1. customwarn to room temperature
  2. customThe mixture was partitioned between water and CH2Cl2
  3. customseparated
  4. extractionthe aqueous layer was extracted with CH2Cl2
  5. dry with materialThe combined organic layers were dried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated to a viscous yellow oil
  8. customPurification via silica gel chromatography

Sources & evidence

ORD record
ord-aa4c5bad08c94c5281a136da88df0421
Source dataset
uspto-grants-2011_04
Patent number
US07928107B2

Reaction notes

Loading…