Water → 4-[(4-isopropoxyphenyl)methyl]-1-isopropyl-5-methyl-3-(6-O-propionyl-beta-D-glucopyranosyloxy)pyrazole

HRID 2375198Notes

Reaction equation

HRID 2375198 reaction equation
[C@@H:1]1([O:12][C:13]2[C:17]([CH2:18][C:19]3[CH:24]=[CH:23][C:22]([O:25][CH:26]([CH3:28])[CH3:27])=[CH:21][CH:20]=3)=[C:16]([CH3:29])[N:15]([CH:30]([CH3:32])[CH3:31])[N:14]=2)[O:9][C@H:8]([CH2:10][OH:11])[C@@H:6]([OH:7])[C@H:4]([OH:5])[C@H:2]1[OH:3].[C:33](Cl)(=[O:36])[CH2:34][CH3:35].O.C(O)(=O)CC(CC(O)=O)(C(O)=O)O.O>CC1C=C(C)C=C(C)N=1>[CH:26]([O:25][C:22]1[CH:23]=[CH:24][C:19]([CH2:18][C:17]2[C:13]([O:12][C@@H:1]3[O:9][C@H:8]([CH2:10][O:11][C:33](=[O:36])[CH2:34][CH3:35])[C@@H:6]([OH:7])[C@H:4]([OH:5])[C@H:2]3[OH:3])=[N:14][N:15]([CH:30]([CH3:32])[CH3:31])[C:16]=2[CH3:29])=[CH:20][CH:21]=1)([CH3:27])[CH3:28]

Participants

6

Reactant 4

HCID 962WaterHCID 222302-Hydroxy-1,2,3-propanetricarboxylic acid hydrate (1:1)HCID 62324Propionyl chlorideHCID 9846588Remogliflozin

Product 1

HCID 673357484-[(4-isopropoxyphenyl)methyl]-1-isopropyl-5-methyl-3-(6-O-propionyl-beta-D-glucopyranosyloxy)pyrazoleYield 65.8%

Reagents, catalysts & solvents 1

HCID 79532,4,6-TrimethylpyridineSolvent

Procedure

To a solution of 3-(β-D-glucopyranosyloxy)-4-[(4-isopropoxyphenyl)methyl]-1-isopropyl-5-methylpyrazole (0.10 g) in 2,4,6-trimethylpyridine (1 mL) was added propionyl chloride (0.072 g) at 0° C., and the mixture was stirred for hours. To the reaction mixture were added citric acid monohydrate (3.3 g) and water, and the resulting mixture was purified by ODS solid phase extraction (washing solvent: distilled water, eluent: methanol). Further purification by column chromatography on silica gel (eluent: dichloromethane/methanol=10/1) afforded 4-[(4-isopropoxyphenyl)methyl]-1-isopropyl-5-methyl-3-(6-O-propionyl-β-D-glucopyranosyloxy)pyrazole (0.074 g)

Workup

  1. distillationthe resulting mixture was purified by ODS solid phase extraction (washing solvent: distilled water, eluent: methanol)
  2. customFurther purification by column chromatography on silica gel (eluent: dichloromethane/methanol=10/1)

Sources & evidence

ORD record
ord-01c65f58ee04452ebb3856af4ac8d209
Source dataset
uspto-grants-2008_12
Patent number
US07465713B2

Reaction notes

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