Triethylamine → tert-Butyl N-[5-(5,6-dimethoxy-3-methyl-1,4-benzoquinon-2-yl)methyl-2-acetoxybenzoyl]-4-aminobenzoate

HRID 1830398Notes

Reaction equation

HRID 1830398 reaction equation
[NH2:1][C:2]1[CH:14]=[CH:13][C:5]([C:6]([O:8][C:9]([CH3:12])([CH3:11])[CH3:10])=[O:7])=[CH:4][CH:3]=1.C(N(CC)CC)C.[Cl-].ClC1N(C)CC[NH+]1C.[CH3:31][O:32][C:33]1[C:34](=[O:57])[C:35]([CH3:56])=[C:36]([CH2:42][C:43]2[CH:44]=[CH:45][C:46]([O:52][C:53](=[O:55])[CH3:54])=[C:47]([CH:51]=2)[C:48](O)=[O:49])[C:37](=[O:41])[C:38]=1[O:39][CH3:40]>C(Cl)Cl>[CH3:31][O:32][C:33]1[C:34](=[O:57])[C:35]([CH3:56])=[C:36]([CH2:42][C:43]2[CH:44]=[CH:45][C:46]([O:52][C:53](=[O:55])[CH3:54])=[C:47]([CH:51]=2)[C:48]([NH:1][C:2]2[CH:14]=[CH:13][C:5]([C:6]([O:8][C:9]([CH3:10])([CH3:11])[CH3:12])=[O:7])=[CH:4][CH:3]=2)=[O:49])[C:37](=[O:41])[C:38]=1[O:39][CH3:40]

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 233272Benzoic acid, 4-amino-, 1,1-dimethylethyl esterHCID 109867151H-Imidazolium, 2-chloro-4,5-dihydro-1,3-dimethyl-, chlorideHCID 220542715-(5,6-Dimethoxy-3-methyl-1,4-benzoquinon-2-yl)methyl-2-acetoxybenzoic Acid

Product 1

HCID 22054238tert-Butyl N-[5-(5,6-dimethoxy-3-methyl-1,4-benzoquinon-2-yl)methyl-2-acetoxybenzoyl]-4-aminobenzoateYield 57%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

tert-Butyl 4-aminobenzoate (0.620 g, 6.209 mmol), triethylamine (0.325 g, 3.209 mmol) and 2-chloro-1,3-dimethylimidazolinium chloride (0.542 g, 3.209 mmol) were added to a methylene chloride solution (150 ml) of 5-(5,6-dimethoxy-3-methyl-1,4-benzoquinon-2-yl)methyl-2-acetoxybenzoic acid (0.400 g, 1.070 mmol) and the resulting solution was stirred at room temperature for 6 hours. The reaction solution was poured into ice water and then extracted with methylene chloride. The extract was washed with water and then dried, and the solvent was removed by distillation. The obtained residue was purified by preparative thin-layer chromatography (ethyl acetate:hexane=1:2→1:0) to obtain the titled compound (0.302 g, 0.549 mmol, 57%).

Workup

  1. extractionextracted with methylene chloride
  2. washThe extract was washed with water
  3. customdried
  4. customthe solvent was removed by distillation
  5. customThe obtained residue was purified by preparative thin-layer chromatography (ethyl acetate:hexane=1:2→1:0)

Sources & evidence

ORD record
ord-4a5662c53af24a65bad0fd94a7b5231f
Source dataset
uspto-grants-2006_06
Patent number
US07064124B2

Reaction notes

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