Maleimide → 3a,4,7,7a-Tetrahydro-4-methoxy-4,7-ethano-1H-isoindole-1,3(2H)-dione

HRID 1290849Notes

Reaction equation

HRID 1290849 reaction equation
[CH3:1][O:2][C:3]1[CH2:8][CH:7]=[CH:6][CH2:5][CH:4]=1.[C:9]1(=[O:15])[NH:13][C:12](=[O:14])[CH:11]=[CH:10]1>C(Cl)(Cl)Cl>[CH3:1][O:2][C:3]12[CH2:8][CH2:7][CH:6]([CH:5]=[CH:4]1)[CH:11]1[CH:10]2[C:9](=[O:15])[NH:13][C:12]1=[O:14]

Participants

4

Reactant 2

HCID 10935MaleimideHCID 761561-Methoxycyclohexa-1,4-diene

Product 1

HCID 152891533a,4,7,7a-Tetrahydro-4-methoxy-4,7-ethano-1H-isoindole-1,3(2H)-dione

Reagents, catalysts & solvents 1

HCID 6212ChloroformSolvent

Procedure

11 g (0.1 mol) of 1-methoxycyclohexa-1,4-diene are heated under reflux with 0.1 g of tris(triphenylphosphine)-ruthenium dichloride and 8.8 g (0.09 mol) of maleimide in 100 ml of absolute chloroform overnight. The mixture is concentrated and the residue is recrystallized from 100 ml of toluene.

Workup

  1. concentrationThe mixture is concentrated
  2. customthe residue is recrystallized from 100 ml of toluene

Sources & evidence

ORD record
ord-1437bdb0047944af88b30d6a77d03725
Source dataset
uspto-grants-1998_05
Patent number
US05753669

Reaction notes

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