Bromocyclopentane → 2-(4-Cyano-2-ethylphenylimino)-1-cyclopentyl-3-thia-1-azaspiro[4.4]nonane
Reaction equation
[C:1]([C:3]1[CH:8]=[CH:7][C:6]([N:9]=[C:10]2[S:14][CH2:13][C:12]3([CH2:18][CH2:17][CH2:16][CH2:15]3)[NH:11]2)=[C:5]([CH2:19][CH3:20])[CH:4]=1)#[N:2].[CH:21]1(Br)[CH2:25][CH2:24][CH2:23][CH2:22]1>>[C:1]([C:3]1[CH:8]=[CH:7][C:6]([N:9]=[C:10]2[S:14][CH2:13][C:12]3([CH2:15][CH2:16][CH2:17][CH2:18]3)[N:11]2[CH:21]2[CH2:25][CH2:24][CH2:23][CH2:22]2)=[C:5]([CH2:19][CH3:20])[CH:4]=1)#[N:2]Participants
Procedure
1-Hydroxymethylcyclopentanamine was prepared according to Method B1c. The 2-hydroxyethylamine was converted to 1-chloromethylcyclopentanamine HCl salt according to Method B7e. 1-Chloromethylcyclopentanamine HCl salt was reacted with 4-cyano-2-ethylphenyl isothiocyanate according to Method C1e to give 2-(4-cyano-2-ethylphenylimino)-3-thia-1-azaspiro[4.4]nonane. The thiazolidine was reacted with cyclopentyl bromide according to Method D2b to give 2-(4-cyano-2-ethylphenylimino)-1-cyclopentyl-3-thia-1-azaspiro[4.4]nonane. The nitrile was reduced according to Method D11a to give 2-(4-formyl-2-ethylphenylimino)-1-cyclopentyl-3-thia-1-azaspiro[4.4]nonane. The aldehyde was reacted with diethyl (2-oxopropyl)phosphonate according to Method D12a according to afford 2-(2-ethyl-4-((1E)-2-acetylvinyl)phenylimino)-1-cyclopentyl-3-thia-1-azaspiro[4.4]nonane.
Sources & evidence
- ORD record
- ord-a96d7c030ad74cb7936187f476cb6c17
- Source dataset
- uspto-grants-2002_03
- Patent number
- US06353006B1
Reaction notes
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