1-Hydroxybenzotriazole → benzyl N-[4-[[[2-(2,6-difluoro-4-hydroxyphenyl)-2-ethoxyacetyl]amino]methyl]benzenecarboximidoyl]carbamate

HRID 1247366Notes

Reaction equation

HRID 1247366 reaction equation
[F:1][C:2]1[CH:7]=[C:6]([OH:8])[CH:5]=[C:4]([F:9])[C:3]=1[CH:10]([O:14][CH2:15][CH3:16])[C:11]([OH:13])=O.Cl.Cl.[CH2:19]([O:26][C:27](=[O:39])[NH:28][C:29]([C:31]1[CH:36]=[CH:35][C:34]([CH2:37][NH2:38])=[CH:33][CH:32]=1)=[NH:30])[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1.C1C=CC2N(O)N=NC=2C=1.Cl.CN(C)CCCN=C=NCC>CN(C=O)C.CCN(CC)CC>[CH2:19]([O:26][C:27](=[O:39])[NH:28][C:29]([C:31]1[CH:32]=[CH:33][C:34]([CH2:37][NH:38][C:11](=[O:13])[CH:10]([C:3]2[C:4]([F:9])=[CH:5][C:6]([OH:8])=[CH:7][C:2]=2[F:1])[O:14][CH2:15][CH3:16])=[CH:35][CH:36]=1)=[NH:30])[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1

Participants

7

Reactant 4

HCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 21904946(RS)-(2,6-difluoro-4-hydroxy-phenyl)-ethoxy-acetic acidHCID 141089245Carbamic acid, [[4-(aminomethyl)phenyl]iminomethyl]-, phenylmethyl ester, dihydrochloride

Product 1

HCID 140474529benzyl N-[4-[[[2-(2,6-difluoro-4-hydroxyphenyl)-2-ethoxyacetyl]amino]methyl]benzenecarboximidoyl]carbamateYield 67.6%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8471TriethylamineSolvent

Procedure

(RS)-(2,6-Difluoro-4-hydroxy-phenyl)-ethoxy-acetic acid (2.3 g) was dissolved in DMF (75 ml) and [(4-aminomethyl-phenyl)-imino-methyl]-carbamic acid benzyl ester dihydrochloride [Prepared according to Ch. Lila, Ph. Gloanec, L. Cadet, Y. Hervé, J. Fournier, F. Leborgne, T. J. Verbeuren, G. De Nanteuil, Synthetic Communications 1998, 28, 23, 4419–4429] (3.18 g) and HOBt (2.15 g) were successively added. The slurry was cooled in an ice bath and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (3.05 g) was added. Et3N (8.0 ml) was slowly added. The resulting mixture was left to stir over night warming up to rt. After removing the solvent precipitation from CH2Cl2/MeOH 19:1 yielded the product. Drying over night on the high vacuum afforded 3.0 g (60 g) of pure (RS)-[(4-{[2-(2,6-difluoro-4-hydroxy-phenyl)-2-ethoxy-acetylamino]-methyl}-phenyl)-imino-methyl]-carbamic acid benzyl ester. White solid. MS 498.3 ([M+H]+).

Workup

  1. temperatureThe slurry was cooled in an ice bath
  2. waitThe resulting mixture was left
  3. customAfter removing
  4. customthe solvent precipitation from CH2Cl2/MeOH 19:1
  5. customyielded the product
  6. customDrying over night on the high vacuum

Sources & evidence

ORD record
ord-2f930b53dcb74442b7f5088de9341fec
Source dataset
uspto-grants-2006_10
Patent number
US07129238B2

Reaction notes

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