Ethanolamine → 2-[2-(acetylamino)pyridin-4-yl]-4-(2-chlorophenyl)-N-(2-hydroxyethyl)-1,3-thiazole-5-carboxamide

HRID 2282314Notes

Reaction equation

HRID 2282314 reaction equation
[C:1]([NH:4][C:5]1[CH:10]=[C:9]([C:11]2[S:12][C:13]([C:23](O)=[O:24])=[C:14]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=3[Cl:22])[N:15]=2)[CH:8]=[CH:7][N:6]=1)(=[O:3])[CH3:2].C(Cl)Cl.Cl.CN(C)CCCN=C=NCC.ON1C2C=CC=CC=2N=N1.[CH2:51]([CH2:53][NH2:54])[OH:52]>>[C:1]([NH:4][C:5]1[CH:10]=[C:9]([C:11]2[S:12][C:13]([C:23]([NH:54][CH2:53][CH2:51][OH:52])=[O:24])=[C:14]([C:16]3[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=3[Cl:22])[N:15]=2)[CH:8]=[CH:7][N:6]=1)(=[O:3])[CH3:2]

Participants

6

Reactant 5

HCID 700EthanolamineHCID 6344DichloromethaneHCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 580949642-[2-(Acetylamino)pyridin-4-yl]-4-(2-chlorophenyl)-1,3-thiazole-5-carboxylic acid

Product 1

HCID 668555632-[2-(acetylamino)pyridin-4-yl]-4-(2-chlorophenyl)-N-(2-hydroxyethyl)-1,3-thiazole-5-carboxamideYield 55.4%

Procedure

To a stirred solution of 2-[2-(acetylamino)pyridin-4-yl]-4-(2-chlorophenyl)-1,3-thiazole-5-carboxylic acid (0.050 g, 0.130 mmol) in methylene chloride (3.00 mL, 46.80 mmol) was added N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (0.056 g, 0.294 mmol) followed by 1-hydroxybenzotriazole (0.040 g, 0.294 mmol) and the resulting solution was stirred for 1 h. Ethanolamine (0.081 mL, 1.340 mmol) was added and the reaction mixture was continued to stir for 18 h. The mixture was quenched by the addition of water (5.0 mL) and extracted with EtOAc (10.0 mL×3). The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated in vacuo. The residue was purified by column chromatography (SiO2, elution with 0-75% EtOAc in hexanes) to provide 0.0300 g of product as a clear colorless oil (54% 2 steps). LC/MS (AA) ES+417, 419. 1H NMR (400 MHz, d1 CDCl3) δ: 8.06-7.98 (m, 1H), 7.72-7.54 (m, 3H), 7.49-7.44 (m, 2H), 7.02-6.96 (m, 1H), 6.28 (br s, 1H), 4.72 (br t, J=5.6 Hz, 1H), 4.66 (br t, J=5.4 Hz, 1H), 3.37 (q, J=6.0 Hz, 2H), 3.18 (q, J=6.4 Hz, 2H), 2.12 (s, 3H).

Workup

  1. stirringto stir for 18 h
  2. customThe mixture was quenched by the addition of water (5.0 mL)
  3. extractionextracted with EtOAc (10.0 mL×3)
  4. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe residue was purified by column chromatography (SiO2, elution with 0-75% EtOAc in hexanes)

Sources & evidence

ORD record
ord-1a16cad722024e32adf32298b0347fb8
Source dataset
uspto-grants-2015_09
Patent number
US09139589B2

Reaction notes

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