Triethylamine → (R)-isobutyl 1-(2-(2-hydroxyphenyl)-7-methylquinazolin-4-yl)pyrrolidin-3-ylcarbamate

HRID 2406178Notes

Reaction equation

HRID 2406178 reaction equation
C(N(CC)CC)C.[NH2:8][C@@H:9]1[CH2:13][CH2:12][N:11]([C:14]2[C:23]3[C:18](=[CH:19][C:20]([CH3:24])=[CH:21][CH:22]=3)[N:17]=[C:16]([C:25]3[CH:30]=[CH:29][CH:28]=[CH:27][C:26]=3[OH:31])[N:15]=2)[CH2:10]1.Cl[C:33]([O:35][CH2:36][CH:37]([CH3:39])[CH3:38])=[O:34]>CN(C=O)C>[OH:31][C:26]1[CH:27]=[CH:28][CH:29]=[CH:30][C:25]=1[C:16]1[N:15]=[C:14]([N:11]2[CH2:12][CH2:13][C@@H:9]([NH:8][C:33](=[O:34])[O:35][CH2:36][CH:37]([CH3:39])[CH3:38])[CH2:10]2)[C:23]2[C:18](=[CH:19][C:20]([CH3:24])=[CH:21][CH:22]=2)[N:17]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 62365Isobutyl chloroformateHCID 136121376(R)-2-(4-(3-aminopyrrolidin-1-yl)-7-methylquinazolin-2-yl)phenol

Product 1

HCID 135771831(R)-isobutyl 1-(2-(2-hydroxyphenyl)-7-methylquinazolin-4-yl)pyrrolidin-3-ylcarbamateYield 58.2%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
-20 °C

Procedure

Under an N2 atmosphere, triethylamine (0.35 mL, 2.5 mmol) was added to a solution of (R)-2-(4-(3-aminopyrrolidin-1-yl)-7-methylquinazolin-2-yl)phenol (0.40 g, 1.25 mmol) in DMF (6.0 mL). The reaction mixture was cooled to −20° C. external temperature, and isobutyl chloroformate (180 μL, 1.38 mmol) was added dropwise. The reaction was stirred for 10 minutes at −20° C. and 15 minutes at RT. The mixture was quenched with H2O, and partitioned between CH2Cl2 and H2O, and the aqueous layer was extracted once more with CH2Cl2. The organic phase was dried over Na2SO4, filtered and purified via silica gel chromatography using 6% EtOAc in a 1:1 mixture of hexanes and CH2Cl2 to yield (R)-isobutyl 1-(2-(2-hydroxyphenyl)-7-methylquinazolin-4-yl)pyrrolidin-3-ylcarbamate (compound 5) (306 mg, 58%). 1H NMR (400 MHz, DMSO-d6) δ 8.43 (m, 1H), 8.18 (d, J=8.6 Hz, 1H), 7.59 (s, 2H), 7.35 (m, 2H), 6.92 (m, 2H), 4.06 (m, 5H), 3.75 (d, J=4.4 Hz, 2H), 2.49 (s, 3H), 2.23 (m, 1H), 2.03 (m, 1H), 1.83 (m, 1H), 0.87 (d, J=6.5 Hz, 6H) ppm. LC/MS: m/z 421.3 (M+H)+ at 2.54 min (10%-99% CH3CN (0.035% TFA)/H2O (0.05% TFA)).

Workup

  1. additionwas added dropwise
  2. customThe mixture was quenched with H2O
  3. custompartitioned between CH2Cl2 and H2O
  4. extractionthe aqueous layer was extracted once more with CH2Cl2
  5. dry with materialThe organic phase was dried over Na2SO4
  6. filtrationfiltered
  7. custompurified via silica gel chromatography
  8. additionin a 1:1 mixture of hexanes and CH2Cl2

Sources & evidence

ORD record
ord-4d64a18155314937be44a5f5ac703777
Source dataset
uspto-grants-2014_08
Patent number
US08809353B2

Reaction notes

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