1-Hydroxybenzotriazole → N-[2,6-dichloro-4-[[[(3-hydroxyphenyl)methyl]amino]carbonyl]benzoyl]-3-[[(1,1-dimethylethoxy)carbonyl]amino]-L-alanine, methyl ester

HRID 1352057Notes

Reaction equation

HRID 1352057 reaction equation
C(N(C(C)C)CC)(C)C.[Cl:10][C:11]1[CH:19]=[C:18]([C:20]([NH:22][CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[C:26]([OH:30])[CH:25]=2)=[O:21])[CH:17]=[C:16]([Cl:31])[C:12]=1[C:13]([OH:15])=O.Cl.[CH3:33][C:34]([CH3:47])([O:36][C:37]([NH:39][CH2:40][C@@H:41]([C:43]([O:45][CH3:46])=[O:44])[NH2:42])=[O:38])[CH3:35].C1C=CC2N(O)N=NC=2C=1.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>CN(C)C=O>[Cl:31][C:16]1[CH:17]=[C:18]([C:20]([NH:22][CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[C:26]([OH:30])[CH:25]=2)=[O:21])[CH:19]=[C:11]([Cl:10])[C:12]=1[C:13]([NH:42][C@H:41]([C:43]([O:45][CH3:46])=[O:44])[CH2:40][NH:39][C:37]([O:36][C:34]([CH3:47])([CH3:35])[CH3:33])=[O:38])=[O:15]

Participants

7

Reactant 5

HCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 18334328methyl (2S)-2-amino-3-{[(tert-butoxy)carbonyl]amino}propanoate hydrochlorideHCID 226615502,6-Dichloro-4-[[(3-hydroxybenzyl)amino]carbonyl]benzoic acid

Product 1

HCID 131723029N-[2,6-dichloro-4-[[[(3-hydroxyphenyl)methyl]amino]carbonyl]benzoyl]-3-[[(1,1-dimethylethoxy)carbonyl]amino]-L-alanine, methyl esterYield 73%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Diisopropylethylamine (14 mL, 80.6 mmol) was added to a cooled (˜0° C.) solution of 2,6-dichloro-4-[[[(3-hydroxyphenyl)methyl]amino]carbonyl]benzoic acid (Example 29; 7.44 g, 21.9 mmol), 3-[[(1,1-dimethylethoxy)carbonyl]amino]-L-alanine, methyl ester, hydrochloride (6.15 g, 24.1 mmol), HOBT (3.12 g, 22.8 mmol), and HBTU (8.64 g, 22.8 mmol) in N,N-dimethyl-formamide (200 mL). The mixture was stirred at room temperature for 16 h. The solvent was evaporated and ethyl acetate (200 mL) was added. The solution was washed with 1 M HCl (100 mL) and the aqueous layer was extracted with ethyl acetate (100 mL). The combined organic layers were washed with saturated aqueous sodium hydrogen carbonate, and brine (200 mL each), dried (MgSO4), filtered, evaporated, and chromatographed (70% ethyl acetate/hexanes) to give N-[2,6-dichloro-4-[[[(3-hydroxyphenyl)methyl]amino]carbonyl]benzoyl]-3-[[(1,1-dimethylethoxy)carbonyl]amino]-L-alanine, methyl ester (8.64 g, 73%) as a white foam.

Workup

  1. customThe solvent was evaporated
  2. additionethyl acetate (200 mL) was added
  3. washThe solution was washed with 1 M HCl (100 mL)
  4. extractionthe aqueous layer was extracted with ethyl acetate (100 mL)
  5. washThe combined organic layers were washed with saturated aqueous sodium hydrogen carbonate, and brine (200 mL each)
  6. dry with materialdried (MgSO4)
  7. filtrationfiltered
  8. customevaporated
  9. customchromatographed (70% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-09372600748b4bb992edd91387739ef0
Source dataset
uspto-grants-2007_05
Patent number
US07217728B2

Reaction notes

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