Reformatsky Reaction of Methyl 1-Bromocycloalkanecarboxylates with -Dicarbonyl Compounds
作者:N. F. Kirillov、V. V. Shchepin、L. A. Vedernikova
DOI:10.1023/b:rujo.0000045183.34092.05
日期:2004.7
Reformatsky reactions of methyl 1-bromocyclohexanecarboxylate and methyl 1-bromocyclopentanecarboxylate with 2-aryl-2-oxoacetaidehydes involve both carbonyl groups of the latter and result in formation of 3a-aryl-3,3:6,6-bis(pentamethylene)- and 3a-aryl-3,3:6,6-bis(tetramethylene)tetrahydrofuro-[3,2-b]furan-2,5-diones. The reaction with 2-(2,4-dimethylphenyl)-2-oxoacetaldehyde gives acyclic products, methyl 1-[1-hydroxy-2-(2,4-dimethylphenyl)-2-oxoethyl]cyclohexanecarboxylate and methyl 1-[1-hydroxy-2(2,,4-dimethylphenyl)-2-oxoethyllcyclopentanecarboxylate, while with benzil methyl 1-(4-hydroxy-1-oxo-3,4-diphenyl-2-oxaspiro[4.5]dec-3-yl)cyclohexanecarboxylate and methyl 1-(4-hydroxy-1-oxo-3,4-diphenyl-2-oxaspiro[4.4]non-3-yl)cyclopentanecarboxylate are obtained.