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

HRID 2199166Notes

Reaction equation

HRID 2199166 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[CH2:8][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>C(Cl)Cl>[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[CH2:8][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

4

Reactant 2

HCID 78373Dimethylformamide dimethyl acetalHCID 598345072-[3,5-Dichloro-4-(5-isopropyl-6-oxo-1,6-dihydro-pyridazin-3-ylmethyl)-phenyl]-isoindole-1,3-dione

Product 1

HCID 598344532-[3,5-Dichloro-4-(5-isopropyl-1-methyl-6-oxo-1,6-dihydro-pyridazin-3-ylmethyl)-phenyl]-isoindole-1,3-dioneYield 52%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Conditions

Temperature
105 °C

Procedure

A mixture of 2-[3,5-dichloro-4-(5-isopropyl-6-oxo-1,6-dihydro-pyridazin-3-ylmethyl)-phenyl]-isoindole-1,3-dione (92) (570 mg, 1.29 mmol) and N,N-dimethylformamide dimethyl acetal (12 mL) was heated to 105° C. for 4.5 h. At this time, the reaction was cooled to 25° C. and diluted with methylene chloride. This solution was washed with water (1×50 mL) and a saturated aqueous sodium chloride solution (1×50 mL), dried with magnesium sulfate, filtered and concentrated under vacuum. Flash chromatography (Merck Silica gel 60, 230-400 mesh, 95:5 methylene chloride/methanol) afforded 2-[3,5-dichloro-4-(5-isopropyl-1-methyl-6-oxo-1,6-dihydro-pyridazin-3-ylmethyl)-phenyl]-isoindole-1,3-dione (93) (310 mg, 52%) as an off-white solid; ES_HRMS m/e calcd for C23H19Cl2N3O3 (M+H)+ 456.0876, found 456.0876. Exact Mass=455.0803; Molecular Weight=456.3322.

Workup

  1. temperatureAt this time, the reaction was cooled to 25° C.
  2. washThis solution was washed with water (1×50 mL)
  3. dry with materiala saturated aqueous sodium chloride solution (1×50 mL), dried with magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under vacuum

Sources & evidence

ORD record
ord-7c1d4069174f4d709aa708ee5e251a3f
Source dataset
uspto-grants-2016_06
Patent number
USRE046024E1

Reaction notes

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