2-(2,6-Dichloro-phenylamino)-1,6-dimethyl-9-oxo-8,9-dihydro-1H-imidazo[4,5-h]isoquinoline-7-carbaldehyde → 2-(2,6-Dichloro-phenylamino)-7-(1-hydroxy-allyl)-1,6-dimethyl-1,8-dihydro-imidazo[4,5-h]isoquinolin-9-one

HRID 1634237Notes

Reaction equation

[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([Cl:8])[C:3]=1[NH:9][C:10]1[N:11]([CH3:27])[C:12]2[C:21]3[C:20](=[O:22])[NH:19][C:18]([CH:23]=[O:24])=[C:17]([CH3:25])[C:16]=3[CH:15]=[CH:14][C:13]=2[N:26]=1.[CH:28]([Mg]Br)=[CH2:29]>C1COCC1>[Cl:8][C:4]1[CH:5]=[CH:6][CH:7]=[C:2]([Cl:1])[C:3]=1[NH:9][C:10]1[N:11]([CH3:27])[C:12]2[C:21]3[C:20](=[O:22])[NH:19][C:18]([CH:23]([OH:24])[CH:28]=[CH2:29])=[C:17]([CH3:25])[C:16]=3[CH:15]=[CH:14][C:13]=2[N:26]=1

Participants

Conditions

Temperature: -78 °C

Procedure

A suspension of 2-(2,6-dichlorophenylamino)-1,6-dimethyl-9-oxo-8,9-dihydro-1-H-imidazo[4,5-h]isoquinoline-7-carbaldehyde (2) (100 mg, 0.25 mmol) in THF (3ml) was cooled to −78° C. Vinylmagnesium bromide (1M in THF, 2.0 mmol) was added dropwise, and the brown suspension was warmed gradually to −10° C. over 2 h. The solution was quenched with saturated ammonium chloride and extracted with ethyl acetate, and concentrated in vacuo to provide the title compound, which was used in the next step without purification, mp 235-236° C., MS (ES) 429 (MH+).

Workup

temperaturethe brown suspension was warmed gradually to −10° C. over 2 h
customThe solution was quenched with saturated ammonium chloride
extractionextracted with ethyl acetate
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-cd90e00591a04262b9dc3a5f73e83131
Source dataset: uspto-grants-2003_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06506769B2

Reaction notes

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