Phthalic Anhydride → HCID 2755705, compound

HRID 658658Notes

Reaction equation

HRID 658658 reaction equation
S([N:11]1[CH:15]=[C:14]([NH2:16])[CH:13]=[N:12]1)(C1C=CC(C)=CC=1)(=O)=O.[C:17]1(=[O:27])[C:25]2[C:20](=[CH:21][CH:22]=[CH:23][CH:24]=2)[C:19](=[O:26])O1>CN(C=O)C.C(#N)C.O>[NH:11]1[CH:15]=[C:14]([N:16]2[C:19](=[O:26])[C:20]3[C:25](=[CH:24][CH:23]=[CH:22][CH:21]=3)[C:17]2=[O:27])[CH:13]=[N:12]1

Participants

5

Reactant 2

HCID 6811Phthalic AnhydrideHCID 57944975HCID 57944975, compound

Product 1

HCID 2755705HCID 2755705, compoundYield 92.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 21891449acetonitrile N,N-dimethylformamideSolvent

Procedure

1-tosyl-1H-pyrazol-4-amine (example 9-1b) (3 g, 12.7 mmol) and isobenzofuran-1,3-dione (1.9 g, 13 mmol) were stirred in DMF/Acetonitrile (1/1) (20 mL) at 100° C. for 1 hour. The mixture was cooled and diluted with H2O. The precipitate was collected by filtration, washed with additional water followed by ethyl acetate and hexanes. The solid product was dried under high vacuum to afford 2-(1H-pyrazol-4-yl)isoindoline-1,3-dione (2.5 g, 92%) as a yellow solid. MS M+H calculated 214.1; found 214.1. 1H NMR (CDCl3, 400 MHz) δ 7.93-8.10 (m, 6H), 13.03 (bs, 1H).

Workup

  1. temperatureThe mixture was cooled
  2. filtrationThe precipitate was collected by filtration
  3. washwashed with additional water
  4. customThe solid product was dried under high vacuum

Sources & evidence

ORD record
ord-375edc131b1b40a2bd33e72c291ddb1b
Source dataset
uspto-grants-2011_12
Patent number
US08076491B2

Reaction notes

Loading…