4,6-Dioxo-10-propyl-4H,6H-benzo(1,2-b:5,4-b')dipyran-2,8-dicarboxylic acid → HCID 131712429, compound

HRID 847698Notes

Reaction equation

HRID 847698 reaction equation
[O:1]=[C:2]1[CH:7]=[C:6]([C:8]([OH:10])=[O:9])[O:5][C:4]2[C:11]([CH2:23][CH2:24][CH3:25])=[C:12]3[C:17](=[CH:18][C:3]1=2)[C:16](=[O:19])[CH:15]=[C:14]([C:20]([OH:22])=[O:21])[O:13]3.C(=O)([O-])[O-].[NH2:30][C:31]([NH2:33])=[NH2+:32].[NH2:34][C:35]([NH2:37])=[NH2+:36]>O>[NH2:32][C:31]([NH2:33])=[NH2+:30].[NH2:36][C:35]([NH2:37])=[NH2+:34].[O:19]=[C:16]1[CH:15]=[C:14]([C:20]([O-:22])=[O:21])[O:13][C:12]2[C:11]([CH2:23][CH2:24][CH3:25])=[C:4]3[C:3](=[CH:18][C:17]1=2)[C:2](=[O:1])[CH:7]=[C:6]([C:8]([O-:10])=[O:9])[O:5]3

Participants

4

Reactant 2

HCID 719504,6-Dioxo-10-propyl-4H,6H-benzo(1,2-b:5,4-b')dipyran-2,8-dicarboxylic acidHCID 2723642HCID 2723642, compound

Product 1

HCID 131712429HCID 131712429, compoundYield 62.2%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

4,6-Dioxo-10-propyl-4H,6H-benzo[1,2-b:5,4-b']dipyran-2,8-dicarboxylic acid (1.0 g) was added to a stirred solution of guanidinium carbonate (0.52 g) in water (20 ml) and the mixture was stirred at room temperature until effervescence had ceased. The precipitated solid was collected using a centrifuge, washed with water and acetone and dried in vacuo at 70° C. to give the title compound (0.83 g; 62%).

Workup

  1. customThe precipitated solid was collected
  2. washwashed with water and acetone
  3. customdried in vacuo at 70° C.

Sources & evidence

ORD record
ord-9bd503af679c4e8098bc16607c14d1cd
Source dataset
uspto-grants-1981_10
Patent number
US04293541

Reaction notes

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