Water → 1H-Isoindole-1,3(2H)-dione, 2-(4-chloro-2-fluoro-5-(2-propynyloxy)phenyl)-4,5,6,7-tetrahydro-

HRID 1980067Notes

Reaction equation

HRID 1980067 reaction equation
[Cl:1][C:2]1[C:8]([O:9][CH2:10][C:11]#[CH:12])=[CH:7][C:5]([NH2:6])=[C:4]([F:13])[CH:3]=1.[C:14]1(=O)[O:19][C:17](=[O:18])[C:16]2[CH2:20][CH2:21][CH2:22][CH2:23][C:15]1=2.O>C(O)(=O)C>[Cl:1][C:2]1[C:8]([O:9][CH2:10][C:11]#[CH:12])=[CH:7][C:5]([N:6]2[C:17](=[O:18])[C:16]3[CH2:20][CH2:21][CH2:22][CH2:23][C:15]=3[C:14]2=[O:19])=[C:4]([F:13])[CH:3]=1

Participants

5

Reactant 3

HCID 962WaterHCID 124753,4,5,6-Tetrahydrophthalic anhydrideHCID 13272927Benzenamine, 4-chloro-2-fluoro-5-(2-propynyloxy)-

Product 1

HCID 1079551H-Isoindole-1,3(2H)-dione, 2-(4-chloro-2-fluoro-5-(2-propynyloxy)phenyl)-4,5,6,7-tetrahydro-Yield 40.9%

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

4-Chloro-2-fluoro-5-(2-propynyloxy)aniline (1.9 g) and 3,4,5,6-tetrahydrophthalic anhydride (1.52 g) were dissolved in acetic acid (20 ml) and refluxed for 3 hours. The resultant mixture was allowed to cool to room temperature and poured into water, followed by extraction with ether. The extract was washed with water, dried over anhydrous sodium sulfate and subjected to filtration. The filtrate was concentrated under reduced pressure and the residue was purified by silica gel chromatography to obtain 1.3 g of N-[4-chloro-2-fluoro-5-(2-propynyloxy)phenyl]3,4,5,6-tetrahydrophthalimide (Compound No. 3). M.P. 136.4° C.

Workup

  1. temperaturerefluxed for 3 hours
  2. extractionfollowed by extraction with ether
  3. washThe extract was washed with water
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationsubjected to filtration
  6. concentrationThe filtrate was concentrated under reduced pressure
  7. customthe residue was purified by silica gel chromatography

Sources & evidence

ORD record
ord-f429a64e096c4ead87f2b486cc709366
Source dataset
uspto-grants-1984_11
Patent number
US04484941

Reaction notes

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