Hydrochloric Acid → 3-[4-(3,4-Dichloro-benzyloxy)-phenyl]-2-oxo-1,2,3,5,7,8-hexahydro-4-oxa-1,6-diaza-anthracene-6,7-dicarboxylic acid 6-tert-butyl ester

HRID 2369114Notes

Reaction equation

HRID 2369114 reaction equation
C[O:2][C:3]([C@@H:5]1[CH2:18][C:17]2[CH:16]=[C:15]3[C:10]([O:11][CH:12]([C:20]4[CH:25]=[CH:24][C:23]([O:26][CH2:27][C:28]5[CH:33]=[CH:32][C:31]([Cl:34])=[C:30]([Cl:35])[CH:29]=5)=[CH:22][CH:21]=4)[C:13](=[O:19])[NH:14]3)=[CH:9][C:8]=2[CH2:7][N:6]1[C:36]([O:38][C:39]([CH3:42])([CH3:41])[CH3:40])=[O:37])=[O:4].[OH-].[Li+].Cl>C1COCC1.CO>[C:39]([O:38][C:36]([N:6]1[CH:5]([C:3]([OH:4])=[O:2])[CH2:18][C:17]2[CH:16]=[C:15]3[C:10]([O:11][CH:12]([C:20]4[CH:25]=[CH:24][C:23]([O:26][CH2:27][C:28]5[CH:33]=[CH:32][C:31]([Cl:34])=[C:30]([Cl:35])[CH:29]=5)=[CH:22][CH:21]=4)[C:13](=[O:19])[NH:14]3)=[CH:9][C:8]=2[CH2:7]1)=[O:37])([CH3:42])([CH3:40])[CH3:41]

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 3939Lithium Hydroxide2×HCID 68586022HCID 68586022, compound

Product 1

HCID 669230113-[4-(3,4-Dichloro-benzyloxy)-phenyl]-2-oxo-1,2,3,5,7,8-hexahydro-4-oxa-1,6-diaza-anthracene-6,7-dicarboxylic acid 6-tert-butyl esterYield 95.9%

Reagents, catalysts & solvents 1

HCID 21899815MeOH tetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

(7S)-3-[4-(3,4-dichloro-benzyloxy)-phenyl]-2-oxo-1,2,3,5,7,8-hexahydro-4-oxa-1,6-diaza-anthracene-6,7-dicarboxylic acid 6-tert-butyl ester 7-methyl ester (1.6 g) was dissolved in THF-methanol (4:1, 20 mL), 2 N lithium hydroxide solution (2.5 mL) was added, and the resulting reaction mixture was stirred at 0° C. for 3 h when an additional equiv of LiOH (2N) was added. The resulting mixture stirred at 0° C. for 3 h. The reaction mixture was neutralized with 1N HCl and extracted with ethyl acetate. The organic layer was washed with brine, dried over sodium sulfate, and the solvent was removed under reduced pressure to afford 3-[4-(3,4-dichloro-benzyloxy)-phenyl]-2-oxo-1,2,3,5,7,8-hexahydro-4-oxa-1,6-diaza-anthracene-6,7-dicarboxylic acid 6-tert-butyl ester (1.5 g). LC-MS (m/z) 601.

Workup

  1. customthe resulting reaction mixture
  2. additionwas added
  3. extractionextracted with ethyl acetate
  4. washThe organic layer was washed with brine
  5. dry with materialdried over sodium sulfate
  6. customthe solvent was removed under reduced pressure

Sources & evidence

ORD record
ord-4ed2364427064fc898c68a7d38658b28
Source dataset
uspto-grants-2014_04
Patent number
US08703766B2

Reaction notes

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