Diisopropylethylamine → methyl N-(benzyloxycarbonyl)4-aminomethylsalicylate

HRID 1956014Notes

Reaction equation

HRID 1956014 reaction equation
Cl.[NH2:2][CH2:3][C:4]1[CH:5]=[C:6]([OH:14])[C:7](=[CH:12][CH:13]=1)[C:8]([O:10][CH3:11])=[O:9].C(N(CC)C(C)C)(C)C.[CH2:24]([O:31][C:32](ON1C(=O)CCC1=O)=[O:33])[C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1>C(Cl)(Cl)Cl>[CH2:24]([O:31][C:32]([NH:2][CH2:3][C:4]1[CH:5]=[C:6]([OH:14])[C:7](=[CH:12][CH:13]=1)[C:8]([O:10][CH3:11])=[O:9])=[O:33])[C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1

Participants

5

Reactant 3

HCID 81531DiisopropylethylamineHCID 83172Benzyl succinimido carbonateHCID 22556073Methyl 4-aminomethylsalicylate hydrochloride

Product 1

HCID 54246052methyl N-(benzyloxycarbonyl)4-aminomethylsalicylateYield 84.3%

Reagents, catalysts & solvents 1

HCID 6212ChloroformSolvent

Procedure

Methyl 4-aminomethylsalicylate hydrochloride (5.04 g 23.2 mmoles) was suspended in chloroform (80 mL) and N,N-diisopropylethylamine (4.10 mL, 23.5 mmoles) and N-(benzyloxycarbonyloxy)succinimide (6.48 g, 26.0 mmoles) were added. The reaction mixture was stirred at room temperature for 4 hours, during which time all solids dissolved. The reaction mixture was then extracted with 1N aqueous hydrochloric acid (100 mL), water (75 mL), and saturated aqueous sodium chloride (50 mL). The chloroform solution was dried over anhydrous magnesium sulfate, filtered and evaporated to dryness to give a white solid. The product was crystallized from ethyl acetate:hexanes to afford 6.17 g (84% yield) of methyl N-(benzyloxycarbonyl)-4-aminomethylsalicylate (m.p. 91°-92° C., open capillary, uncorrected).

Workup

  1. dissolutiondissolved
  2. extractionThe reaction mixture was then extracted with 1N aqueous hydrochloric acid (100 mL), water (75 mL), and saturated aqueous sodium chloride (50 mL)
  3. dry with materialThe chloroform solution was dried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. customevaporated to dryness
  6. customto give a white solid
  7. customThe product was crystallized from ethyl acetate

Sources & evidence

ORD record
ord-f0ebdc41a86c44978e35ea4298414a1e
Source dataset
uspto-grants-1998_07
Patent number
US05777148

Reaction notes

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