Dimethylformamide dimethyl acetal → 2-[3,5-Dichloro-4-(5-isopropyl-1-methyl-6-oxo-1,6-dihydro-pyridazin-3-yloxy)-phenyl]-isoindole-1,3-dione

HRID 2199145Notes

Reaction equation

HRID 2199145 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([N:20]2[C:28](=[O:29])[C:27]3[C:22](=[CH:23][CH:24]=[CH:25][CH:26]=3)[C:21]2=[O:30])[CH:5]=[C:6]([Cl:19])[C:7]=1[O:8][C:9]1[CH:14]=[C:13]([CH:15]([CH3:17])[CH3:16])[C:12](=[O:18])[NH:11][N:10]=1.[CH3:31]OC(OC)N(C)C>>[Cl:19][C:6]1[CH:5]=[C:4]([N:20]2[C:21](=[O:30])[C:22]3[C:27](=[CH:26][CH:25]=[CH:24][CH:23]=3)[C:28]2=[O:29])[CH:3]=[C:2]([Cl:1])[C:7]=1[O:8][C:9]1[CH:14]=[C:13]([CH:15]([CH3:17])[CH3:16])[C:12](=[O:18])[N:11]([CH3:31])[N:10]=1

Participants

3

Reactant 2

HCID 78373Dimethylformamide dimethyl acetalHCID 598344332-[3,5-Dichloro-4-(5-isopropyl-6-oxo-1,6-dihydro-pyridazin-3-yloxy)-phenyl]-isoindole-1,3-dione

Product 1

HCID 598345522-[3,5-Dichloro-4-(5-isopropyl-1-methyl-6-oxo-1,6-dihydro-pyridazin-3-yloxy)-phenyl]-isoindole-1,3-dioneYield 73%

Procedure

A suspension of 2-[3,5-dichloro-4-(5-isopropyl-6-oxo-1,6-dihydro-pyridazin-3-yloxy)-phenyl]isoindole-1,3-dione (65) (84.5 g, 190.2 mmol) in N,N-dimethylformamide dimethyl acetal (250 mL) was heated to reflux for 5 h. At this time, the reaction was cooled to room temperature. The solids that resulted were collected by filtration, washed with a 1:1 mixture of methyl tert-butyl ether:heptane (70 mL) followed by heptane (70 mL) and dried under vacuum to afford 2-[3,5-dichloro-4-(5-isopropyl-1-methyl-6-oxo-1,6-dihydro-pyridazin-3-yloxy)-phenyl]-isoindole-1,3-dione (66) (63.57 g, 73%) as an off-white solid; ES(+)-LRMS for C22H17Cl2N3O4 (M+H)+ at m/z=458. Exact Mass=457.0596; Molecular Weight=458.30.

Workup

  1. temperaturewas heated
  2. temperatureto reflux for 5 h
  3. customThe solids that resulted
  4. filtrationwere collected by filtration
  5. washwashed with a 1:1 mixture of methyl tert-butyl ether
  6. customdried under vacuum

Sources & evidence

ORD record
ord-081801a9ba90411c84085db061dfbe95
Source dataset
uspto-grants-2016_06
Patent number
USRE046024E1

Reaction notes

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