Methanol → Zoledronate disodium tetrahydrate

HRID 2246870Notes

Reaction equation

HRID 2246870 reaction equation
[OH-:1].[Na+:2].CO.[CH:5]1[N:9]=[CH:8][N:7]([CH2:10][C:11]([P:17]([OH:20])([OH:19])=[O:18])([P:13]([OH:16])([OH:15])=[O:14])[OH:12])[CH:6]=1>O>[CH:5]1[N:9]=[CH:8][N:7]([CH2:10][C:11]([P:13]([O-:16])([OH:15])=[O:14])([P:17]([O-:19])([OH:20])=[O:18])[OH:12])[CH:6]=1.[OH2:1].[OH2:12].[OH2:12].[OH2:12].[Na+:2].[Na+:2]

Participants

5

Reactant 3

HCID 887Methanol2×HCID 14798Sodium HydroxideHCID 68740Zoledronic Acid

Product 1

HCID 23649597Zoledronate disodium tetrahydrateYield 97%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

A solution of sodium hydroxide (1.4 g) in a mixture of water (20% v/v)/Methanol (80% v/v, 10 volumes per grams of ZLD-Ac form D) (10 ml) was added drop-wise to a suspension of Zoledronic acid form I (5.0 g) in a mixture of water (20% v/v)/Methanol (80% v/v, 10 volumes per grams of ZLD-Ac) (53 ml) at reflux temperature. The reaction mixture was heated at reflux temperature for additional 17 hours. Then the reaction mixture was cooled to room temperature. Further cooling was performed using an ice-bath. The precipitate was then filtered, washed with Methanol (1×10 ml) and dried in a vacuum oven at 50° C. for 26 hours to give 5.6 g (97%) of Zoledronate disodium crystal form XIV (LOD by TGA=1.4%). Purity by HPLC 99.9%.

Workup

  1. additionwas added drop-wise
  2. temperatureat reflux temperature
  3. temperatureThe reaction mixture was heated
  4. temperatureat reflux temperature for additional 17 hours
  5. temperatureFurther cooling
  6. filtrationThe precipitate was then filtered
  7. washwashed with Methanol (1×10 ml)
  8. customdried in a vacuum oven at 50° C. for 26 hours

Sources & evidence

ORD record
ord-ac2acd0fd8cc4bab854ec4c49207f58f
Source dataset
uspto-grants-2010_03
Patent number
US07687636B2

Reaction notes

Loading…