A highly efficient one‐pot transformation of readily accessible furans into 4‐hydroxy‐2‐cyclopentenones in H2O, using singlet oxygen as oxidant, has been developed.
A synthetic approach to the plakoridines modeled on a biogenetic theory
作者:Laura L. Etchells、Ali Sardarian、Roger C. Whitehead
DOI:10.1016/j.tetlet.2005.02.124
日期:2005.4
An expedient synthetic route to the fully substituted pyrrolidine ring system of the plakoridines is described using an approach modeled on a plausible biosynthetic pathway.
使用模拟生物合成途径的方法描述了权宜的合成途径,用于合成吡咯烷的吡咯烷环系统。
Three New Furan Derivatives and a New Fatty Acid from a Taiwanese Marine Sponge <i>Plakortis simplex</i>
作者:Ya-Ching Shen、Chaturvedula V. S. Prakash、Yao-Haur Kuo
DOI:10.1021/np000413d
日期:2001.3.1
(6-8), together with a new fattyacid, plakortic acid (9), have been isolated from the Taiwanese marine spongePlakortis simplex in addition to the known metabolites chondrillin (1), 6-epi-chondrillin (2), 2-oxo-2,5-dihydrofuran-5-acetic acid methyl ester (methyl 1,4-epoxy-1-oxo-2-hexenoate) (3), dimethyl beta-ketoadipate (4), and the monomethyl ester of cis,cis-muconic acid (5). The structures of these
Nickel catalysis synthesis of 2,5-disubstituted furans from aryl (alkyl) iodide
作者:Zhongqiang Sun
DOI:10.1080/10426507.2023.2249576
日期:2024.1.2
A new methodology using various aryl(alkyl)iodides and CaC2 as coupling partners has been developed for the successful preparation of 2,5-disubstitutedfurans in good to excellent yields. The broad...
Chemical predisposition in synthesis: application to the preparation of the pyrrolidine natural products, plakoridines A and B
作者:Laura L. Etchells、Madeleine Helliwell、Neil M. Kershaw、Ali Sardarian、Roger C. Whitehead
DOI:10.1016/j.tet.2006.08.075
日期:2006.11
The pyrrolidine natural products, plakoridines A and B, as well as an array of unnatural analogues, have been prepared using a five-step synthetic sequence modelled on a biogenetic theory. The key transformation involves a `Mannich/Michael/intemal-redox' cascade, which proceeds in yields of 31-63%. (c) 2006 Elsevier Ltd. All fights reserved.