2,5-Dimethylcyclopentan-1-one → 6,9-Dimethyl-5,6,7,8,9,10-hexahydro-6,9-methanobenzocycloocten-11-one
Reaction equation
Br[CH:2](Br)[C:3]1[C:4]([CH3:9])=[CH:5][CH:6]=[CH:7][CH:8]=1.[CH3:11][CH:12]1[CH2:16][CH2:15][CH:14]([CH3:17])[C:13]1=[O:18]>>[CH3:11][C:12]12[C:13](=[O:18])[C:14]([CH3:17])([CH2:15][CH2:16]1)[CH2:9][C:4]1[CH:5]=[CH:6][CH:7]=[CH:8][C:3]=1[CH2:2]2Participants
Procedure
A process for the preparation of the compounds of the present invention which are substituted by alkyl substituents, e.g., methyl substitutents in the 6 and/or 9 positions, begins with the treatment of an α,α-dihaloxylene with an alkylated or dialkylated derivative of the appropriate cycloalkanone-enamine. Thus, for example, α,α-dibromoxylene is treated with the pyrrolidine enamine of 2,5 -dimethylcyclopentanone to produce the corresponding 6,9-dimethyl-5,6,7,8,9,10-hexahydro-6,9-methanobenzocyclooctene-11-one, followed by thallation as described hereinabove, to introduce the corresponding 2'-hydroxy compound and subsequent conversion to the oxime, followed by catalytic reduction to the desired d,l-11- endo-amine-6,9-dimethyl-5,6,7,8,9,10-hexahydro-6,9-methanobenzocyclooctene.
Workup
- customA process for the preparation of the compounds of the present invention which
Sources & evidence
- ORD record
- ord-e2a7905b49324a118095d9114e388bf9
- Source dataset
- uspto-grants-1982_07
- Patent number
- US04341904
Reaction notes
Loading…