Water → Ethyl 6-(3-chloro-4-fluorobenzyl)-4-hydroxy-5-oxo-5,6,7,8-tetrahydro-2,6-naphthyridine-1-carboxylate

HRID 2426443Notes

Reaction equation

HRID 2426443 reaction equation
C(O[C:6]1[O:10][C:9]([C:11]([O:13][CH2:14][CH3:15])=[O:12])=[N:8][CH:7]=1)CCC.[Cl:16][C:17]1[CH:18]=[C:19]([CH:28]=[CH:29][C:30]=1[F:31])[CH2:20][N:21]1[CH2:26][CH2:25][CH:24]=[CH:23][C:22]1=[O:27].O>>[Cl:16][C:17]1[CH:18]=[C:19]([CH:28]=[CH:29][C:30]=1[F:31])[CH2:20][N:21]1[CH2:26][CH2:25][C:24]2[C:9]([C:11]([O:13][CH2:14][CH3:15])=[O:12])=[N:8][CH:7]=[C:6]([OH:10])[C:23]=2[C:22]1=[O:27]

Participants

4

Reactant 3

HCID 962WaterHCID 594556041-(3-Chloro-4-fluorobenzyl)-5,6-dihydropyridin-2(1H)-oneHCID 66996945Ethyl 5-butoxy-1,3-oxazole-2-carboxylate

Product 1

HCID 59455599Ethyl 6-(3-chloro-4-fluorobenzyl)-4-hydroxy-5-oxo-5,6,7,8-tetrahydro-2,6-naphthyridine-1-carboxylate

Conditions

Temperature
130 °C

Procedure

A mixture of ethyl 5-butoxy-1,3-oxazole-2-carboxylate (44.5 g, 208.6 mol), 1-(3-chloro-4-fluorobenzyl)-5,6-dihydropyridin-2(1H)-one (25 g, 104.3 mol), and water (2.82 mL, 156.7 mol) was heated in a sealed heavy walled vessel at 130° C. with stirring for 72 hours. Upon cooling, the product mixture solidified. The solid was triturated with diethyl ether and collected by filtration. The product was further purified by crystallization from boiling ethyl acetate.

Workup

  1. temperatureUpon cooling
  2. customThe solid was triturated with diethyl ether
  3. filtrationcollected by filtration
  4. customThe product was further purified by crystallization

Sources & evidence

ORD record
ord-ad9a5f7bfd654c459c0232b768fbfc12
Source dataset
uspto-grants-2011_06
Patent number
US07968564B2

Reaction notes

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