Rh(i)-catalyzed intramolecular [3 + 2] cycloaddition reactions of 1-ene-, 1-yne- and 1-allene-vinylcyclopropanes
作者:Lei Jiao、Mu Lin、Zhi-Xiang Yu
DOI:10.1039/b922417c
日期:——
New Rh(I)-catalyzed intramolecular [3 + 2] cycloaddition reactions of 1-ene-, 1-yne and 1-allene-vinylcyclopropanes have been developed, affording an efficient and versatile synthesis of cyclopentane- and cyclopentene-embedded bicyclic structures.
Ynol Ethers as Ketene Equivalents in Rhodium-Catalyzed Intermolecular [5 + 2] Cycloaddition Reactions
作者:Paul A. Wender、Christian Ebner、Brandon D. Fennell、Fuyuhiko Inagaki、Birte Schröder
DOI:10.1021/acs.orglett.7b02765
日期:2017.11.3
electron-rich alkynes (ynol ethers) have been found to provide a highly efficient, direct route to dioxygenated seven-membered rings, a common feature of numerous natural and non-natural targets and building blocks for synthesis. The reactions proceed in high yield at roomtemperature and tolerate a broad range of functionalities. Substituted VCPs were found to react with high regioselectivity.
Synthesis of Novel 2′-Spirocyclopropyl-5′- Deoxyphosphonic Acid Furanosyl Nucleoside Analogues as Potent Antiviral Agents
作者:Guang Huan Shen、Joon Hee Hong
DOI:10.1080/15257770.2012.695839
日期:2012.7
Novel 5'-deoxyfuranosyl purine phosphonic acid analogues with 2'-electropositive moiety, such as spirocyclopropanoid, were designed and synthesized from commercially available diethyl malonate. Condensation reaction successfully proceeded from a glycosyl donor 15 at low reaction temperature in Vorbruggen conditions to give desired phosphonate analogues 16b and 23b. The synthesized nucleotide analogues 19, 22, 26, and 29 were subjected to antiviral screening against HIV-1. Adenine phosphonic acid analogue 22 shows significant anti-HIV activity (EC50 = 7.9 mu M).