Potassium Hydroxide → Boc-D-Met-Gly-OH

HRID 2412963Notes

Reaction equation

HRID 2412963 reaction equation
C[O:2][C:3](=[O:21])[CH2:4][NH:5][C:6](=[O:20])[C@@H:7]([CH2:16][CH2:17][S:18][CH3:19])[NH:8][C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10].[OH-].[K+]>CO>[C:12]([O:11][C:9]([NH:8][C@@H:7]([C:6]([NH:5][CH2:4][C:3]([OH:21])=[O:2])=[O:20])[CH2:16][CH2:17][S:18][CH3:19])=[O:10])([CH3:15])([CH3:13])[CH3:14]

Participants

4

Reactant 2

HCID 14797Potassium HydroxideHCID 13216971methyl Boc-D-methionyl-glycinate

Product 1

HCID 7019049Boc-D-Met-Gly-OH

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

The title compound of Example 8 (32.0 g, 0.1 mole) was dissolved in 200 ml of methanol to which was added 200 ml of 2M potassium hydroxide. After ca. 5 min. at room temperature the solution was concentrated to about half volume and diluted with ethyl acetate. The solution was neutralized by washing with two portions of 0.5M potassium bisulfate, and then dried over magnesium sulfate, filtered, and concentrated in vacuo. The crude product was recrystallized to give the title compound, which was used in subsequent reactions without further purification.

Workup

  1. concentrationAfter ca. 5 min. at room temperature the solution was concentrated to about half volume
  2. additiondiluted with ethyl acetate
  3. washby washing with two portions of 0.5M potassium bisulfate
  4. dry with materialdried over magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe crude product was recrystallized

Sources & evidence

ORD record
ord-11e4838ecad94281ad38aa688db8493a
Source dataset
uspto-grants-1985_01
Patent number
US04495178

Reaction notes

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