Fumaric Acid → HCID 86749893, compound

HRID 864070Notes

Reaction equation

HRID 864070 reaction equation
[N:1]([C@H:4]([CH3:21])[CH2:5][N:6]1[C:10]2=[CH:11][C:12]3[C:17]([CH2:16][CH:15]=[CH:14][C:13]=3[O:18][CH2:19][CH3:20])=[C:9]2[CH:8]=[N:7]1)=[N+]=[N-].[C:22]([OH:29])(=[O:28])/[CH:23]=[CH:24]/[C:25]([OH:27])=[O:26]>C(O)C.C(OCC)C.CO.[Pt]=O>[C:22]([OH:29])(=[O:28])/[CH:23]=[CH:24]/[C:25]([OH:27])=[O:26].[CH2:19]([O:18][C:13]1[CH:14]=[CH:15][CH2:16][C:17]2[C:12]=1[CH:11]=[C:10]1[C:9]=2[CH:8]=[N:7][N:6]1[CH2:5][C@H:4]([NH2:1])[CH3:21])[CH3:20]

Participants

7

Reactant 2

HCID 444972Fumaric AcidHCID 86749892HCID 86749892, compound

Product 1

HCID 86749893HCID 86749893, compoundYield 86.3%

Reagents, catalysts & solvents 4

HCID 82844Platinum oxide (PtO)CatalystHCID 702EthanolSolventHCID 887MethanolSolventHCID 3283Diethyl EtherSolvent

Procedure

1.76 g (6.21 mmol) of (R)-1-(2-azido-propyl)-7-ethoxy-1,4-dihydro-indeno[2,1-c]pyrazole dissolved in 100 ml of anhydrous ethanol were hydrogenated on 180 mg of platinum oxide for 17 hours. The catalyst was subsequently filtered off, rinsed with ethanol and the solvent was removed in a vacuum. The colorless oil obtained was dissolved in 100 ml of anhydrous diethyl ether, filtered and treated while stirring with a solution of 721 mg (6.21 mmol) of fumaric acid in 10 ml of methanol. The mixture was stirred at room temperature for 15 hours and the white crystals were subsequently filtered off. 2.0 g (86%) of (R)-2-(7-ethoxy-1,4-dihydro-indeno[2,1-c]pyrazol-1-yl)-1-methyl-ethylamine fumarate (1:1) with m.p. 161° were obtained.

Workup

  1. filtrationThe catalyst was subsequently filtered off
  2. washrinsed with ethanol
  3. customthe solvent was removed in a vacuum
  4. customThe colorless oil obtained
  5. filtrationfiltered
  6. additiontreated
  7. filtrationthe white crystals were subsequently filtered off

Sources & evidence

ORD record
ord-b0d15e7315b94cb4a82fa59813013ba0
Source dataset
uspto-grants-1996_10
Patent number
US05561150

Reaction notes

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