Synthesis of 8-Aryl-Substituted Coumarins Based on Ring-Closing Metathesis and Suzuki–Miyaura Coupling: Synthesis of a Furyl Coumarin Natural Product from Galipea panamensis
摘要:
The synthesis of 7-methoxy-8-(4-methyl-3-furyl)-2H-chromen-2-one, a natural product with antileishmanial activity recently isolated from the plant Galipea panamensis, is described. The key step is a Suzuki-Miyaura coupling of a furan-3-boronic acid and an 8-halocoumarin, which is advantageously synthesized using a ring-closing metathesis reaction. Several non-natural analogues are also available along these lines.
Preparation of 3-substituted 4-methylfurans: 3-iodo-4-methyl- and 3-formyl-4-methylfuran
作者:Hans J. Reich、Richard E. Olson
DOI:10.1021/jo00387a043
日期:1987.5
Synthetic Utility of Alkenylcyclobutenedione Monoketals. Michael Additions and the Synthesis of a Natural Benzofuranosesquiterpenequinone
作者:Hui Liu、Leah M. Gayo、Robert W. Sullivan、Angela Y. H. Choi、Harold W. Moore
DOI:10.1021/jo00091a013
日期:1994.6
A new synthetic route to highly substituted cyclobutenones is reported. This involves the 1,6-addition of both heteroatom- and carbon-based nucleophiles to 4,4-dimethoxy-3-ethenyl-2-methylcyclobuten-1-one (8) to give further functionalized cyclobutenedione monoketals. These ketals function as precursors to quinones as illustrated by the synthesis of the natural benzofuranosesquiterpene 23.