Hydrochloric Acid → (S)-2-Amino-3-{(R)-2-[4-(3,4-dichloro-benzyloxy)-phenyl]-2,3-dihydro-benzo[1,4]dioxin-6-yl}-propionic acid methyl ester hydrochloride

HRID 879741Notes

Reaction equation

HRID 879741 reaction equation
[CH3:1][O:2][C:3](=[O:40])[C@@H:4]([NH:32]C(OC(C)(C)C)=O)[CH2:5][C:6]1[CH:31]=[CH:30][C:9]2[O:10][C@H:11]([C:14]3[CH:19]=[CH:18][C:17]([O:20][CH2:21][C:22]4[CH:27]=[CH:26][C:25]([Cl:28])=[C:24]([Cl:29])[CH:23]=4)=[CH:16][CH:15]=3)[CH2:12][O:13][C:8]=2[CH:7]=1.Cl>C(Cl)Cl>[ClH:28].[CH3:1][O:2][C:3](=[O:40])[C@@H:4]([NH2:32])[CH2:5][C:6]1[CH:31]=[CH:30][C:9]2[O:10][C@H:11]([C:14]3[CH:19]=[CH:18][C:17]([O:20][CH2:21][C:22]4[CH:27]=[CH:26][C:25]([Cl:28])=[C:24]([Cl:29])[CH:23]=4)=[CH:16][CH:15]=3)[CH2:12][O:13][C:8]=2[CH:7]=1

Participants

4

Reactant 2

HCID 313Hydrochloric AcidHCID 58327327(S)-2-tert-Butoxycarbonylamino-3-{(R)-2-[4-(3,4-dichloro-benzyloxy)-phenyl]-2,3-dihydro-benzo[1,4]dioxin-6-yl}-propionic acid methyl ester

Product 1

HCID 66719251(S)-2-Amino-3-{(R)-2-[4-(3,4-dichloro-benzyloxy)-phenyl]-2,3-dihydro-benzo[1,4]dioxin-6-yl}-propionic acid methyl ester hydrochloride

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

(S)-2-tert-Butoxycarbonylamino-3-{(R)-2-[4-(3,4-dichloro-benzyloxy)-phenyl]-2,3-dihydro-benzo[1,4]dioxin-6-yl}-propionic acid methyl ester (3.0 g) was dissolved in 60 mL DCM. 25 mL of 4N HCl (in dioxane) was added and the mixture stirred at room temperature for 2.5 hours. The mixture was concentrated and DCM added and mixture concentrated again. The resulting solid was dried under vacuum to provide 2.6 g. LCMS: m/z 489.

Workup

  1. concentrationThe mixture was concentrated
  2. additionDCM added
  3. concentrationmixture concentrated again
  4. customThe resulting solid was dried under vacuum
  5. customto provide 2.6 g

Sources & evidence

ORD record
ord-e1b8d316744d4f57bd6b3403914d1a31
Source dataset
uspto-grants-2015_03
Patent number
US08987295B2

Reaction notes

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