1-Hydroxybenzotriazole → methyl-[(S)-1-((S)-3-methyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-ylcarbamoyl)-ethyl]-carbamic acid tert-butyl ester

HRID 1055443Notes

Reaction equation

HRID 1055443 reaction equation
FC(F)(F)C(O)=O.[NH2:8][C@H:9]1[CH2:15][O:14][C:13]2[CH:16]=[C:17]([CH3:20])[CH:18]=[CH:19][C:12]=2[NH:11][C:10]1=[O:21].[C:22]([O:26][C:27]([N:29]([CH3:35])[C@@H:30]([CH3:34])[C:31](O)=[O:32])=[O:28])([CH3:25])([CH3:24])[CH3:23].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.CCN(C(C)C)C(C)C>CN(C=O)C.CCOC(C)=O>[C:22]([O:26][C:27](=[O:28])[N:29]([CH3:35])[C@H:30]([C:31](=[O:32])[NH:8][C@@H:9]1[C:10](=[O:21])[NH:11][C:12]2[CH:19]=[CH:18][C:17]([CH3:20])=[CH:16][C:13]=2[O:14][CH2:15]1)[CH3:34])([CH3:23])([CH3:25])[CH3:24]

Participants

8

Reactant 5

HCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 7009590(2S)-2-(((tert-butoxy)carbonyl)(methyl)amino)propanoic acidHCID 90037368HCID 90037368, compound

Product 1

HCID 90037667methyl-[(S)-1-((S)-3-methyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-ylcarbamoyl)-ethyl]-carbamic acid tert-butyl esterYield 103.3%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of (S)-3-amino-8-methyl-2,3-dihydrobenzo[b][1,4]oxazepin-4(5H)-one trifluoroacetate (1.60 g, 5.23 mmol, Eq: 1.00), (S)-2-(tert-butoxycarbonyl(methyl)amino)propanoic acid (1.06 g, 5.23 mmol, Eq: 1.00), HOBT (801 mg, 5.23 mmol, Eq: 1.00), HBTU (1.98 g, 5.23 mmol, Eq: 1.00) at 0° C. and DIEA (2.03 g, 2.73 mL, 15.7 mmol, Eq: 3.00) in DMF (50 mL) was stirred at 0° C. for 1 h, diluted with EtOAc, washed with water, brine, dried over Na2SO4, filtered and concentrated. The residue was purified by silica gel chromatography to afford methyl-[(S)-1-((S)-3-methyl-8-oxo-6,7,8,9-tetrahydro-5-oxa-9-aza-benzocyclohepten-7-ylcarbamoyl)-ethyl]-carbamic acid tert-butyl ester (2.04 g) which was used without purification.

Workup

  1. washwashed with water, brine
  2. dry with materialdried over Na2SO4
  3. filtrationfiltered
  4. concentrationconcentrated
  5. customThe residue was purified by silica gel chromatography

Sources & evidence

ORD record
ord-78f742bb0b4d477a88e9d3359f49cb45
Source dataset
uspto-grants-2016_07
Patent number
US09394263B2

Reaction notes

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