Synthesis of Diazanorcaradienes and 1,2-Diazepines via the Tandem [4+2]-Cycloaddition/Retro-[4+2]-Cycloaddition Reaction between Methoxycarbonylcyclopropenes and Dimethoxycarbonyltetrazine
作者:Alexander Yu. Belyy、Anastasia A. Levina、Dmitry N. Platonov、Rinat F. Salikov、Michael G. Medvedev、Yury V. Tomilov
DOI:10.1002/ejoc.201801861
日期:2019.7.14
Methyl cyclopropenecarboxylates and dimethoxycarbonyltetrazine undergo cascade cycloaddition and retro‐cycloadditionreactions. Depending on substituents in cyclopropenes the reaction either leads to diazanorcaradienes or is accompanied with an electrocyclic ring‐opening and a proton migration or a “walk” rearrangement.
Synthesis of hexahydropolyandrocarpidine (a revised structure)
作者:Kenneth L. Rinehart、Gary C. Harbour、Michael D. Graves、Michael T. Cheng
DOI:10.1016/s0040-4039(00)81718-9
日期:——
The structures previously assigned hexahydropolyandrocarpidines I and II have been revised and hexahydropolyandrocarpidine I [1-(5-guanidinopentyl)-5-octyl-2-pyrrolidinone] has been synthesized.
Cyсlopentadienone and Pyrone Derivatives as Precursors of Electron-Deficient Cycloheptatrienes: Quantum Chemical Investigation and Synthesis
作者:Rinat F. Salikov、Yury V. Tomilov、Alena D. Sokolova、Alexander Yu. Belyy、Dmitry N. Platonov
DOI:10.1055/a-2317-6659
日期:2024.8
Unstable tetra(methoxycarbonyl)cyclopentadienone was investigated in the synthesis of electron-deficient cycloheptatrienes via [4+2]-cycloaddition/cycloelimination reaction with cyclopropenes. The use of its stable dimer did not afford the product although similar reactions with alkynes have been reported. Quantum chemical calculation revealed that cyclopentadienone is not generated from the dimer