Phosphorus oxychloride → tert-butyl N-[(1S)-2-[[(3S)-5-[(6-bromo-2-methoxy-1-naphthyl)methyl]-1-[5-[(3S)-5-[(6-bromo-2-methoxy-1-naphthyl)methyl]-3-[[(2S)-2-[tert-butoxycarbonyl(methyl)amino]propanoyl]amino]-4-oxo-2,3-dihydro-1,5-benzodiazepine-1-carbonyl]pyrazine-2-carbonyl]-4-oxo-2,3-dihydro-1,5-benzodiazepin-3-yl]amino]-1-methyl-2-oxo-ethyl]-N-methyl-carbamate

HRID 1481930Notes

Reaction equation

HRID 1481930 reaction equation
[C:1]([O:5][C:6](=[O:40])[N:7]([C@H:9]([C:11](=[O:39])[NH:12][C@@H:13]1[C:19](=[O:20])[N:18]([CH2:21][C:22]2[C:31]3[C:26](=[CH:27][C:28]([Br:32])=[CH:29][CH:30]=3)[CH:25]=[CH:24][C:23]=2[O:33][CH3:34])[C:17]2[CH:35]=[CH:36][CH:37]=[CH:38][C:16]=2[NH:15][CH2:14]1)[CH3:10])[CH3:8])([CH3:4])([CH3:3])[CH3:2].[N:41]1[CH:46]=[C:45]([C:47]([OH:49])=O)[N:44]=[CH:43][C:42]=1[C:50]([OH:52])=O.O=P(Cl)(Cl)Cl>N1C=CC=CC=1>[Br:32][C:28]1[CH:27]=[C:26]2[C:31](=[CH:30][CH:29]=1)[C:22]([CH2:21][N:18]1[C:17]3[CH:35]=[CH:36][CH:37]=[CH:38][C:16]=3[N:15]([C:47]([C:45]3[CH:46]=[N:41][C:42]([C:50]([N:15]4[C:16]5[CH:38]=[CH:37][CH:36]=[CH:35][C:17]=5[N:18]([CH2:21][C:22]5[C:31]6[C:26](=[CH:27][C:28]([Br:32])=[CH:29][CH:30]=6)[CH:25]=[CH:24][C:23]=5[O:33][CH3:34])[C:19](=[O:20])[C@@H:13]([NH:12][C:11](=[O:39])[C@@H:9]([N:7]([C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:40])[CH3:8])[CH3:10])[CH2:14]4)=[O:52])=[CH:43][N:44]=3)=[O:49])[CH2:14][C@H:13]([NH:12][C:11](=[O:39])[C@@H:9]([N:7]([CH3:8])[C:6](=[O:40])[O:5][C:1]([CH3:2])([CH3:3])[CH3:4])[CH3:10])[C:19]1=[O:20])=[C:23]([O:33][CH3:34])[CH:24]=[CH:25]2

Participants

5

Reactant 3

HCID 24813Phosphorus oxychlorideHCID 255280Pyrazine-2,5-dicarboxylic acidHCID 72713837{(S)-1-[(S)-1-(6-Bromo-2-methoxy-naphthalen-1-ylmethyl)-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepin-3-ylcarbamoyl]-ethyl}-methyl-carbamic acid tert-butyl ester2×

Product 1

HCID 118677416tert-butyl N-[(1S)-2-[[(3S)-5-[(6-bromo-2-methoxy-1-naphthyl)methyl]-1-[5-[(3S)-5-[(6-bromo-2-methoxy-1-naphthyl)methyl]-3-[[(2S)-2-[tert-butoxycarbonyl(methyl)amino]propanoyl]amino]-4-oxo-2,3-dihydro-1,5-benzodiazepine-1-carbonyl]pyrazine-2-carbonyl]-4-oxo-2,3-dihydro-1,5-benzodiazepin-3-yl]amino]-1-methyl-2-oxo-ethyl]-N-methyl-carbamateYield 16%

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

To a solution of {(S)-1-[(S)-1-(6-bromo-2-methoxy-naphthalen-1-ylmethyl)-2-oxo-2,3,4,5-tetrahydro-1H-benzo[b][1,4]diazepin-3-ylcarbamoyl]-ethyl}-methyl-carbamic acid tert-butyl ester (Intermediate 11) (300 mg, 0.49 mmol) and pyrazine-2,5-dicarboxylic acid (41.2 mg, 0.24 mmol) in pyridine (5 mL) at 0° C. was added POCl3 (46 μL, 0.49 mmol) and the cooling bath removed. After 5 h, the mixture was diluted with dichloromethane, washed with water, dried (Na2SO4) and concentrated. The residue was purified by preparative reverse phase HPLC to afford tert-butyl N-[(1S)-2-[[(3S)-5-[(6-bromo-2-methoxy-1-naphthyl)methyl]-1-[5-[(3S)-5-[(6-bromo-2-methoxy-1-naphthyl)methyl]-3-[[(2S)-2-[tert-butoxycarbonyl(methyl)amino]propanoyl]amino]-4-oxo-2,3-dihydro-1,5-benzodiazepine-1-carbonyl]pyrazine-2-carbonyl]-4-oxo-2,3-dihydro-1,5-benzodiazepin-3-yl]amino]-1-methyl-2-oxo-ethyl]-N-methyl-carbamate (52 mg, 7.82%) as an off white solid. LC-MS: 1355.0 (M+H).

Workup

  1. customthe cooling bath removed
  2. additionthe mixture was diluted with dichloromethane
  3. washwashed with water
  4. dry with materialdried (Na2SO4)
  5. concentrationconcentrated
  6. customThe residue was purified by preparative reverse phase HPLC

Sources & evidence

ORD record
ord-fe580fe555bb43bcac849adc5883c722
Source dataset
uspto-grants-2016_08
Patent number
US09409888B2

Reaction notes

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