Ethyl 2- methyl-4-oxocyclohex-2-enecarboxylate (Hagemann's ester) as a precursor to alkyl-substituted 3-methylcyclohexenones
作者:Bruce A. McAndrew
DOI:10.1039/p19790001837
日期:——
from ethyl 2-methyl-4-oxocyclohex-2-enecarboxylate (Hagemann's ester)via the alkylation of its ethylene glycol acetal. Various routes to 6-alkyl-3-methylcyclohex-2-enones from Hagemann's ester have been explored; a particularly convenient route to these unsaturated ketones utilised the isomeric keto-ester, ethyl 4-methyl-2-oxocyclohex-3-enecarboxylate as starting material. The alkylation of ethyl 2-