Synthetic study of phomoidride B (CP-263,114); utilization of the oxidopyrylium [5 + 2] cycloaddition
作者:Naoki Ohmori
DOI:10.1039/b104268h
日期:——
The highly functionalized core structure of phomoidride B
(CP-263,114) was pursued by using intermolecular oxidopyrylium–alkene
cyclization as one of the key steps.
Acylation of Nitronates: [3,3]-Sigmatropic Rearrangement of <i>in Situ</i> Generated <i>N</i>-Acyloxy,<i>N</i>-oxyenamines
作者:Aleksandr O. Kokuev、Yulia A. Antonova、Valentin S. Dorokhov、Ivan S. Golovanov、Yulia V. Nelyubina、Andrey A. Tabolin、Alexey Yu. Sukhorukov、Sema L. Ioffe
DOI:10.1021/acs.joc.8b01652
日期:2018.9.21
affords α-acyloxyoxime derivatives via an umpolung functionalization of the α-position. This transformation involves generation of hitherto unknown N-acyloxy,N-oxyenamines and their fast [3,3]-sigmatropicrearrangement driven by the cleavage of the weak N–O bond. The reaction has a broad scope, and it is regioselective in the case of nitronates possessing nonsymmetrically substituted α-positions. Application
Synthese et reactivite d'oxycyclopropanes electrophiles
作者:Hassan Abdallah、René Grée、Robert Carrié
DOI:10.1016/s0040-4020(01)97205-9
日期:1985.1
“Electrophilic oxycyclopropanes” 4 to 6 have been prepared starting from olefins 7. Ring opening of these cyclopropanes occurs under very smooth conditions (DMSO, room temperature). A push-pull type system is then also a powerful driving force with regard to the C-C bond cleavage in cyclopropanes.
Reactions of stabilized sulfur ylides with α,β-unsaturated alkoxychromiumcarbene complexes
作者:Benito Alcaide、Luis Casarrubios、Gema Domínguez、Angel Retamosa、Miguel A. Sierra
DOI:10.1016/0040-4020(96)00796-x
日期:1996.10
stable ylides would add preferentially to the carbene carbon, 1,4-addition increasing as the stability of the ylide does. For more stable ylides 1,4-addition is preferred and substitution at the β-carbon has little effect in the chemoselectivity. Methoxycarbonylmethylentriphenylphosphorane exclusively add to the carbene carbon while ethyl diazoacetate is unreactive towards α,β-unsaturated alkoxychromium-carbene
Application of [5+2] cycloaddition toward the functionalized bicyclo[4.3.1]decane ring system: synthetic study of phomoidride B (CP-263,114)Preliminary communication: N. Ohmori, Chem. Commun., 2001, 1552.
作者:Naoki Ohmori
DOI:10.1039/b110607b
日期:2002.3.8
Oxidopyrylium–alkene [5+2] cycloaddition was utilized in combination with an intramolecular aldol reaction to construct the bicyclo[4.3.1]decane ring system of phomoidride B (CP-263,114).
氧化吡咯鎓-烯烃[5+2]环加成与分子内羟醛反应相结合,构建了phomoidride B (CP-263,114)的双环[4.3.1]癸烷环系统。