Eleuthesides and their analogs: III. Reaction of Red-Al with γ,δ-epoxy nitriles
摘要:
Oxiranyl-substituted cycloalkenecarbonitriles obtained by the Beckmann fragmentation of oximes derived from levoglucosenone adducts with 1,3-butadiene, isoprene, cyclohexadiene, and cyclopentadiene were subjected to Red-Al reduction with opening of the epoxide ring. The reactions with 1,3-butadiene, isoprene, and cyclohexadiene derivatives were accompanied by cyclopropane ring closure and reduction of the cyano group to aldehyde, whereas the cyclopentadiene derivative underwent hydrogenolysis of the oxirane fragment.
Eleuthesides and their analogs: I. Synthesis of the base compound from levoglucosenone adduct with piperylene
作者:Yu. A. Kondrova、O. Yu. Krasnoslobodtseva、L. V. Spirikhin、F. A. Valeev
DOI:10.1134/s1070428010080063
日期:2010.8
and piperylene was converted into the corresponding oxime, and second-order Beckmannrearrangement of the latter, followed by treatment with a base, gave (1S,2R,6R)-6-(2-hydroxyethyl)-2-methylcyclohex-3-ene-1-carbaldehyde which was used in the synthesis of eleutheside analog. Conditions were found for opening of oxirane ring with formation of primary alcohol and simultaneous reduction of cyano group