3-Chloro-4-fluorobenzaldehyde → 2-benzyl-5-(3-chloro-4-fluorophenyl)-2,3,5,7,8,9-hexahydro-1H-cyclopenta[b][1,7]naphthyridine-4,6-dione

HRID 478279Notes

Reaction equation

HRID 478279 reaction equation
[NH2:1][C:2]1[CH2:6][CH2:5][C:4](=[O:7])[CH:3]=1.[Cl:8][C:9]1[CH:10]=[C:11]([CH:14]=[CH:15][C:16]=1[F:17])[CH:12]=O.[CH2:18]([N:25]1[CH2:30][C:29](=O)[CH2:28][C:27](=[O:32])[CH2:26]1)[C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1>C(O)C>[CH2:18]([N:25]1[CH2:30][C:29]2[NH:1][C:2]3[CH2:6][CH2:5][C:4](=[O:7])[C:3]=3[CH:12]([C:11]3[CH:14]=[CH:15][C:16]([F:17])=[C:9]([Cl:8])[CH:10]=3)[C:28]=2[C:27](=[O:32])[CH2:26]1)[C:19]1[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=1

Participants

5

Reactant 3

HCID 5938663-Chloro-4-fluorobenzaldehydeHCID 111381741-Benzylpiperidine-3,5-dioneHCID 122914403-Aminocyclopent-2-en-1-one

Product 1

HCID 180009582-benzyl-5-(3-chloro-4-fluorophenyl)-2,3,5,7,8,9-hexahydro-1H-cyclopenta[b][1,7]naphthyridine-4,6-dioneYield 53.2%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A mixture of 3-amino-2-cyclopenten-1-one (Kikani, B. B., Synthesis, (1991), 2, 176) (0.78 g, 8 mmol), 3-chloro-4-fluorobenzaldehyde(1.12 g, 8 mmol), and N-benzylpiperidine-3,5-dione (Ziegler, J. Amer. Chem. Soc. (1973), 95, 7458-7464) (1.78 g, 8 mmol) in ethanol (8 mL) was processed as in Example 5A to provide 1.8 g of the title compound.

Sources & evidence

ORD record
ord-3606d4430afc479fbcc728566a6c00bd
Source dataset
uspto-grants-2003_11
Patent number
US06642222B2

Reaction notes

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