fused to a cyclobutane moiety. The cyclohexane ring has a chair conformation and the whole system adopts a syn conformation. The structure provides information on the stereochemicalcourse of the chlorination, photo-oxidation and hydroxylation steps of the reaction.
Synthesis of a new class of aminocyclitol analogues with the conduramine D-2 configuration
作者:Latif Kelebekli、Yunus Kara、Murat Celik
DOI:10.3762/bjoc.6.15
日期:——
aminocyclitol derivatives with the bicyclo[4.2.0]octane skeleton was synthesized starting fromcyclooctatetraene. Photooxygenation of trans-7,8-diacetoxy- and cis-7,8-dichlorobicyclo[4.2.0]octa-2,4-diene afforded the bicyclic endoperoxides. Reduction of the latter with thiourea followed by a Pd(0) catalyzed ionization/cyclization reaction gave the corresponding oxazolidinone derivatives. Oxidation of
Stereospecific synthesis of a new class of compounds: bis-homoconduritol-A, -D, and -F
作者:Latif Kelebekli、Yunus Kara、Metin Balci
DOI:10.1016/j.carres.2005.05.021
日期:2005.9
derivatives with conduritol-A, -D, and -F structures have been synthesized starting from cyclooctatetraene. The photooxygenation of trans-7,8-dibromo- and cis-7,8-dichlorobicyclo[4.2.0]octa-2,4-dienes afforded the bicyclic endoperoxides. Reduction of the endoperoxides with thiourea followed by acetylation gave the corresponding diacetates. The KMnO(4) oxidation and epoxidation of the diacetates followed
The stereochemical configuration of the cycloöctatetraene dihalides
作者:V. Georgian、L. Georgian、A.V. Robertson
DOI:10.1016/s0040-4020(01)98583-7
日期:1963.1
The dichloride and the dibromide of cycloöctatetraene have the stereochemistry shown in formulae IIa and IIIa respectively. The reaction mechanisms leading to these configurations are discussed.