Water → 3-(6-O-ethoxy-carbonyl-beta-D-glucopyranosyloxy)-4-[(4-isopropoxyphenyl)-methyl]-1-isopropyl-5-methylpyrazole

HRID 1668329Notes

Reaction equation

HRID 1668329 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].ClC([O:36][CH2:37][CH3:38])=O.O.C(O)(=O)C[C:42](CC(O)=O)(C(O)=O)[OH:43].O>CC1C=C(C)C=C(C)N=1>[CH2:37]([O:36][O:11][C:10](=[C:42]=[O:43])[C@H:8]1[O:9][C@@H:1]([O:12][C:13]2[C:17]([CH2:18][C:19]3[CH:24]=[CH:23][C:22]([O:25][CH:26]([CH3:27])[CH3:28])=[CH:21][CH:20]=3)=[C:16]([CH3:29])[N:15]([CH:30]([CH3:32])[CH3:31])[N:14]=2)[C@H:2]([OH:3])[C@@H:4]([OH:5])[C@@H:6]1[OH:7])[CH3:38]

Participants

6

Reactant 4

HCID 962WaterHCID 10928Ethyl chloroformateHCID 222302-Hydroxy-1,2,3-propanetricarboxylic acid hydrate (1:1)HCID 9846588Remogliflozin

Product 1

HCID 866027893-(6-O-ethoxy-carbonyl-beta-D-glucopyranosyloxy)-4-[(4-isopropoxyphenyl)-methyl]-1-isopropyl-5-methylpyrazoleYield 72.7%

Reagents, catalysts & solvents 1

HCID 79532,4,6-TrimethylpyridineSolvent

Procedure

To a solution of 3-(β-D-glucopyranosyloxy)-4-[(4-iso-propoxyphenyl)methyl]-1-isopropyl-5-methylpyrazole (0.10 g) in 2,4,6-trimethylpyridine (1 mL) was added ethyl chloroformate (0.072 g), and the mixture was stirred at room temperature overnight. 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) and recrystallization (recrystallization solvent: ethyl acetate/hexane=⅓) afforded 3-(6-O-ethoxy-carbonyl-β-D-glucopyranosyloxy)-4-[(4-isopropoxyphenyl)methyl]-1-isopropyl-5-methylpyrazole (0.084 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
  3. customon silica gel (eluent: dichloromethane/methanol=10/1) and recrystallization (recrystallization solvent: ethyl acetate/hexane=⅓)

Sources & evidence

ORD record
ord-f20f9213d2474f6f8209988617c1508e
Source dataset
uspto-grants-2011_08
Patent number
US07989424B2

Reaction notes

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