Calcium nitrate → Probicromil calcium

HRID 1732875Notes

Reaction equation

HRID 1732875 reaction equation
[N+]([O-])([O-])=O.[Ca+2:5].[N+]([O-])([O-])=O.[O:10]=[C:11]1[CH:16]=[C:15]([C:17]([O-:19])=[O:18])[O:14][C:13]2[C:20]([CH2:32][CH2:33][CH3:34])=[C:21]3[C:26](=[CH:27][C:12]1=2)[C:25](=[O:28])[CH:24]=[C:23]([C:29]([O-:31])=[O:30])[O:22]3.[Na+].[Na+]>O>[O:28]=[C:25]1[CH:24]=[C:23]([C:29]([O-:31])=[O:30])[O:22][C:21]2[C:20]([CH2:32][CH2:33][CH3:34])=[C:13]3[C:12](=[CH:27][C:26]1=2)[C:11](=[O:10])[CH:16]=[C:15]([C:17]([O-:19])=[O:18])[O:14]3.[Ca+2:5]

Participants

4

Reactant 2

HCID 24963Calcium nitrateHCID 20301904HCID 20301904, compound

Product 1

HCID 22287988Probicromil calciumYield 77%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent2×

Procedure

A solution of calcium nitrate (2.0 g) in water (25 ml) was added to a solution of disodium 4,6-dioxo-10-propyl-4H,6H-benzo[1,2-b:5.4-b']dipyran-2,8-dicarboxylate (2.3 g) in water (25 ml) and the mixture was stirred for 30 minutes at room temperature. The precipitate was filtered off, washed well with water and ethanol and dried in vacuo at 70° C. to give the required calcium salt (1.7 g; 77%), m.p.>300° C.

Workup

  1. filtrationThe precipitate was filtered off
  2. washwashed well with water and ethanol
  3. customdried in vacuo at 70° C.

Sources & evidence

ORD record
ord-eb82ced5807744bba44cabe7aab714c7
Source dataset
uspto-grants-1980_12
Patent number
US04239748

Reaction notes

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