Dimethylformamide → 3-Benzyl-7-chloroquinoline-2-carbaldehyde

HRID 271831Notes

Reaction equation

[CH2:1]([C:8]1[C:9](I)=[N:10][C:11]2[C:16]([CH:17]=1)=[CH:15][CH:14]=[C:13]([Cl:18])[CH:12]=2)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([Mg]Cl)(C)C.CN([CH:28]=[O:29])C>C1COCC1>[CH2:1]([C:8]1[C:9]([CH:28]=[O:29])=[N:10][C:11]2[C:16]([CH:17]=1)=[CH:15][CH:14]=[C:13]([Cl:18])[CH:12]=2)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

Conditions

Temperature: -78 °C

Procedure

To a solution of 3-benzyl-7-chloro-2 iodo-quinoline (1.5 g, 3.95 mmol) in 15 mL of anhydrous THF at −78° C., was added isopropylmagnesium chloride (5.93 ml, 11.85 mmol). After stirring at −78° C. for 30 minutes, DMF (1.53 ml, 19.8 mmol) was added. The reaction mixture was allowed to slowly warm to ambient temperature over two hours. It was then quenched with saturated NH4Cl and extracted with ethyl acetate (3×). The combined organic layers were washed with brine, dried over MgSO4, and the solvent was removed in vacuo yielding 1.23 g of 3-benzyl-7-chloroquinoline-2-carbaldehyde 24 as brown oil.

Workup

temperatureto slowly warm to ambient temperature over two hours
customIt was then quenched with saturated NH4Cl
extractionextracted with ethyl acetate (3×)
washThe combined organic layers were washed with brine
dry with materialdried over MgSO4
customthe solvent was removed in vacuo

Sources & evidence

ORD record: ord-bedbda194ea4456c94770f40febc4c85
Source dataset: uspto-grants-2008_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07452996B2

Reaction notes

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