Methyl bromoacetate → HCID 54305290, compound

HRID 1741527Notes

Reaction equation

HRID 1741527 reaction equation
[CH3:1][O:2][C:3](=[O:25])[CH2:4][N:5]1[C:11](=[O:12])[C@@H:10]([NH:13][C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH2:9][NH:8][C:7]2[CH:21]=[CH:22][CH:23]=[CH:24][C:6]1=2.C[Si]([N-][Si](C)(C)C)(C)C.[Li+].C(OC(NC1C(=O)NC2C=CC=CC=2NC1)=O)(C)(C)C.BrCC(OC)=O>C1COCC1.C(OCC)(=O)C>[CH3:1][O:2][C:3](=[O:25])[CH2:4][N:5]1[C:11](=[O:12])[CH:10]([NH:13][C:14]([O:16][C:17]([CH3:20])([CH3:18])[CH3:19])=[O:15])[CH2:9][NH:8][C:7]2[CH:21]=[CH:22][CH:23]=[CH:24][C:6]1=2

Participants

7

Reactant 4

HCID 60984Methyl bromoacetateHCID 2733832Lithium HexamethyldisilazideHCID 15490831HCID 15490831, compoundHCID 54305289(3S)-2-Oxo-3-tert-butoxycarbonylamino-2,3,4,5-tetrahydro-1H-1,5-benzodiazepine-1-acetic acid methyl ester

Product 1

HCID 54305290HCID 54305290, compoundYield 83%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolvent2×HCID 8857Ethyl AcetateSolvent

Procedure

(3(S)-tert-Butoxycarbonylamino-2-oxo-2,3,4,5-tetrahydrobenzo[b][1,4]diazepin-1-yl)acetic acid methyl ester (103). A 1.0 M solution of lithium bis(trimethylsilyl)amide (3.4 ml, 3.4 mmol) in THF was added dropwise to a -78° C. solution of 3-tert-butoxycarbonylamino-1,3,4,5-tetrahydrobenzo[b][1,4]diazepin-2-one (0.94 g, 3.38 mmol) in 20 ml of anhydrous tetrahydrofuran and stirred for 30 minutes. Methyl bromoacetate (o.44 ml, 4 mmol) was added dropwise to the reaction mixture then warmed to room temperature. The reaction was diluted with 100 ml of ethyl acetate and washed with 0.3 N potassium hydrogen sulfate (50 ml), water (2×50 ml), and brine. The combined organics were dried over anhydrous sodium sulfate, filtered, and evaporated to afford a gum that was purified by flash chromatography eluting with 3:7 EtOAc/Hex. to give 0.98 g (83%) of the title compound as a white solid. 1H NMR (CDCl3) δ7.15-7.07 (2H, m), 6.98-6.94 (1H, m), 6.88-6.84 (1H, d), 5.62-5.55 (1H, d), 4.71-4.65 (1H, d), 4.65-4.6 (1H, m), 4.33-4.27 (1H, d), 3.96-3.90 (1H, m), 3.78 (3H, s), 3.44-3.37 (1H, m), 1.4 (9H, s). ##STR170##

Workup

  1. washwashed with 0.3 N potassium hydrogen sulfate (50 ml), water (2×50 ml), and brine
  2. dry with materialThe combined organics were dried over anhydrous sodium sulfate
  3. filtrationfiltered
  4. customevaporated
  5. customto afford a gum that
  6. customwas purified by flash chromatography
  7. washeluting with 3:7 EtOAc/Hex

Sources & evidence

ORD record
ord-a8e37b6d004d46159d9c9c87b82e64e6
Source dataset
uspto-grants-1999_10
Patent number
US05973111

Reaction notes

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