α-Nitrocycloalkanones as a new source for the one-pot synthesis of functionalized 1,4-diketones, γ-oxoaldehydes, γ-ketoesters, and methyl ω-oxoalkanoates
作者:Roberto Ballini、Giovanna Bosica、Fabiola Gigli
DOI:10.1016/s0040-4020(98)00391-3
日期:1998.6
Methyl omega-oxoalkanoates were obtained via ring cleavage of alpha-nitrocycloakanones by refluxing these compounds in a methanolic solution of KOH, then treating the obtained mixture, at 0 degrees C, with an aqueous solution of KMnO4/MgSO4. 1,4-Diketones, gamma-oxoaldehydes, and gamma-ketoesters were also prepared by conjugated addition of alpha-nitrocycloakanones to the appropriate conjugated enones, in MeOH/Ph3P, then by, in situ, ring cleavage-Nef reaction following the above conditions. (C) 1998 Elsevier Science Ltd. All rights reserved.