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 14203Notes

Reaction equation

HRID 14203 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 hydrochloric acid (10 mL), saturated sodium bicarbonate (10 mL), and brine. The organic layer was then dried (magnesium sulfate), filtered, and concentrated under reduced pressure. Purification 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 hydrochloric 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. customPurification by flash column chromatography (silica, 1:9 methanol/chloroform)
  6. customprovided a clear solid
  7. filtrationThe resulting precipitate was collected by filtration

Sources & evidence

ORD record
ord-fbe6f2ace36b4d5c9cfc241123abe1c2
Source dataset
uspto-grants-2010_06
Patent number
US07727997B2

Reaction notes

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