Reactions of Methyl Esters of 1-(α-Bromoisobutyryl)cyclohexanecarboxylic or 3-(1-Bromocyclohexyl)-2,2-dimethyl-3-oxopropanoic Acids with Zinc and Arylglyoxal
摘要:
Methyl esters of 1-(alpha-bromoisobutyryl)cyclohexanecarboxylic or 3-(1-bromocyclohexyl)-2,2-dimethyl-3-oxopropanoic acids react with zinc and arylglyoxals to form 3-aroyl-4,4-dimethyl-2-oxaspiro[5.5]-undecane-1,5-diones or 1-aroyl-4,4-dimethyl-2-oxaspiro[5.5]undecane-3,5-diones, respectively. The former products react with phenylhydrazine, yielding 3-[aryl(2-phenylhydrazono)methyl]-4,4-dimethyl-2-oxaspiro-[5.5]undecane-1,5-diones.