Hydrochloric Acid → 4-Butyl-N-{(1S,2R)-1-(3,5-difluorobenzyl)-3-[(3-ethylbenzyl)amino]-2-hydroxypropyl}-1-(methylsulfonyl)-1,2,3,4-tetrahydroquinoxaline-6-carboxamide

HRID 348993Notes

Reaction equation

HRID 348993 reaction equation
[CH2:1]([N:5]1[C:14]2[C:9](=[CH:10][CH:11]=[C:12]([C:15]([OH:17])=O)[CH:13]=2)[N:8]([S:18]([CH3:21])(=[O:20])=[O:19])[CH2:7][CH2:6]1)[CH2:2][CH2:3][CH3:4].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C1C=CC2N(O)N=NC=2C=1.C(N(C(C)C)CC)(C)C.[NH2:65][C@@H:66]([CH2:80][C:81]1[CH:86]=[C:85]([F:87])[CH:84]=[C:83]([F:88])[CH:82]=1)[C@H:67]([OH:79])[CH2:68][NH:69][CH2:70][C:71]1[CH:76]=[CH:75][CH:74]=[C:73]([CH2:77][CH3:78])[CH:72]=1.Cl>C(Cl)Cl.CO>[CH2:1]([N:5]1[C:14]2[C:9](=[CH:10][CH:11]=[C:12]([C:15]([NH:65][C@@H:66]([CH2:80][C:81]3[CH:82]=[C:83]([F:88])[CH:84]=[C:85]([F:87])[CH:86]=3)[C@H:67]([OH:79])[CH2:68][NH:69][CH2:70][C:71]3[CH:76]=[CH:75][CH:74]=[C:73]([CH2:77][CH3:78])[CH:72]=3)=[O:17])[CH:13]=2)[N:8]([S:18]([CH3:21])(=[O:20])=[O:19])[CH2:7][CH2:6]1)[CH2:2][CH2:3][CH3:4]

Participants

9

Reactant 6

HCID 313Hydrochloric AcidHCID 757711-HydroxybenzotriazoleHCID 81531Diisopropylethylamine2×HCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 210859284-Butyl-1-(methylsulfonyl)-1,2,3,4-tetrahydroquinoxaline-6-carboxylic acidHCID 57487282(2R,3S)-3-amino-4-(3,5-difluorophenyl)-1-[(3-ethylbenzyl)amino]butan-2-ol

Product 1

HCID 575120614-Butyl-N-{(1S,2R)-1-(3,5-difluorobenzyl)-3-[(3-ethylbenzyl)amino]-2-hydroxypropyl}-1-(methylsulfonyl)-1,2,3,4-tetrahydroquinoxaline-6-carboxamideYield 45.2%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 6344DichloromethaneSolvent3×

Procedure

A solution of 4-butyl-1-(methylsulfonyl)-1,2,3,4-tetrahydroquinoxaline-6-carboxylic acid (99 mg), HATU (181 mg), HOBt (64 mg), and diisopropylethylamine (100 μL) was stirred in methylene chloride (1.0 mL) for 15 min. A solution of (2R,3S)-3-amino-4-(3,5-difluorophenyl)-1-[(3-ethylbenzyl)amino]butan-2-ol (129 mg) and diisopropylethylamine (100 μL) in methylene chloride (1.0 mL) was added and the mixture was stirred overnight. The mixture was diluted with methylene chloride, washed with 1 N hydorchloric acid (10 mL), saturated sodium bicarbonate (10 mL), and brine. The organic layer was then dried (magnesium sulfate), filtered, and concentrated under reduced pressure. Purificatio by flash column chromatography (silica, 1:9 methanol/chloroform) provided a clear solid. The solid was dissolved in methanol (1 mL), and treated with hydrochloric acid (0.5 mL, 1.0 M diethyl ether). The resulting precipitate was collected by filtration to provide 90 mg of the title compound: ESI MS m/z 629 [M+H]+.

Workup

  1. washwashed with 1 N hydorchloric acid (10 mL), saturated sodium bicarbonate (10 mL), and brine
  2. dry with materialThe organic layer was then dried (magnesium sulfate)
  3. filtrationfiltered
  4. concentrationconcentrated under reduced pressure
  5. customPurificatio by flash column chromatography (silica, 1:9 methanol/chloroform) provided a clear solid
  6. filtrationThe resulting precipitate was collected by filtration

Sources & evidence

ORD record
ord-cca39f16f6d2442d986ff9c592e84355
Source dataset
uspto-grants-2007_02
Patent number
US07176242B2

Reaction notes

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