Salicylic Acid → Tert-butyl 2-(2-hydroxybenzamido)propylcarbamate

HRID 2280539Notes

Reaction equation

HRID 2280539 reaction equation
[NH2:1][CH:2]([CH3:12])[CH2:3][NH:4][C:5](=[O:11])[O:6][C:7]([CH3:10])([CH3:9])[CH3:8].[OH:13][C:14]1[CH:22]=[CH:21][CH:20]=[CH:19][C:15]=1[C:16](O)=[O:17].N1C=CN=C1.C1CCC(N=C=NC2CCCCC2)CC1>CCOC(C)=O>[OH:13][C:14]1[CH:22]=[CH:21][CH:20]=[CH:19][C:15]=1[C:16]([NH:1][CH:2]([CH3:12])[CH2:3][NH:4][C:5](=[O:11])[O:6][C:7]([CH3:8])([CH3:10])[CH3:9])=[O:17]

Participants

6

Reactant 4

HCID 338Salicylic AcidHCID 795ImidazoleHCID 10868DicyclohexylcarbodiimideHCID 22499135tert-Butyl (2-aminopropyl)carbamate

Product 1

HCID 67493246Tert-butyl 2-(2-hydroxybenzamido)propylcarbamateYield 40%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent2×

Procedure

To a solution of tert-butyl 2-aminopropylcarbamate (3.6 g, 20.6 mmol), 2-hydroxybenzoic acid (2.79 g, 20.6 mmol) and imidazole (1.41 g, 20.6 mmol) in EtOAc (100 mL) at 0° C. was slowly added a solution of DCC (4.26 g, 20.6 mmol) in EtOAc (50 mL). The reaction mixture was stirred (RT, 16 h), filtered and concentrated under reduced pressure. The crude product was purified by silica chromatography, EtOAc/Petroleum ether (0-20%) to afford tert-butyl 2-(2-hydroxybenzamido)propylcarbamate (2.4 g, 40%) as a white solid.

Workup

  1. filtrationfiltered
  2. concentrationconcentrated under reduced pressure
  3. customThe crude product was purified by silica chromatography, EtOAc/Petroleum ether (0-20%)

Sources & evidence

ORD record
ord-2af71bd8163f4436bd08191f973c89ed
Source dataset
uspto-grants-2015_09
Patent number
US09139516B2

Reaction notes

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