Isopropanol → Zoledronate disodium tetrahydrate

HRID 2115239Notes

Reaction equation

HRID 2115239 reaction equation
[OH-:1].[Na+:2].[CH:3]1[N:7]=[CH:6][N:5]([CH2:8][C:9]([P:15]([OH:18])([OH:17])=[O:16])([P:11]([OH:14])([OH:13])=[O:12])[OH:10])[CH:4]=1.CC([OH:22])C>O>[CH:3]1[N:7]=[CH:6][N:5]([CH2:8][C:9]([P:11]([O-:14])([OH:13])=[O:12])([P:15]([O-:17])([OH:18])=[O:16])[OH:10])[CH:4]=1.[OH2:22].[OH2:1].[OH2:10].[OH2:10].[Na+:2].[Na+:2]

Participants

5

Reactant 3

HCID 3776IsopropanolHCID 14798Sodium HydroxideHCID 68740Zoledronic Acid3×

Product 1

HCID 23649597Zoledronate disodium tetrahydrateYield 91%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

A solution of sodium hydroxide (0.7 g) in a mixture of water (20% v/v)/IPA (80% v/v, 10 volumes per grams of ZLD-Ac form XII) (10 ml) was added drop-wise to a suspension of Zoledronic acid form XII (4.98 g) in a mixture of water (20% v/v)/IPA (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 16 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 IPA (1×25 ml) and dried in a vacuum oven at 50° C. for 24 hours to give 4.7 g (91%) of Zoledronate disodium crystal form X (LOD by TGA=2.6%).

Workup

  1. additionwas added drop-wise
  2. temperatureat reflux temperature
  3. temperatureThe reaction mixture was heated
  4. temperatureat reflux temperature for additional 16 hours
  5. temperatureFurther cooling
  6. filtrationThe precipitate was then filtered
  7. washwashed with IPA (1×25 ml)
  8. customdried in a vacuum oven at 50° C. for 24 hours

Sources & evidence

ORD record
ord-ebacb9ad65864a08b75245a3d110cc6d
Source dataset
uspto-grants-2008_10
Patent number
US07435827B2

Reaction notes

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