Synthesis and stereochemistry of 8-methyl-5-nitro-1-octalones
摘要:
Base catalyzed Michael addition of 5-nitropentan-2-one ethylene ketal (I) and cyclohex-2-enone (2), subsequent deprotection, and intramolecular aldol condensation yields the 8-methyl-5-nitro-1-octalone isomers (5a, b). The structure, relative configuration, and conformation of 5a and 5b were elucidated utilizing the results of H-1 and C-13 NMR investigations
Phase-Transfer-Catalyst-Mediated Domino Reaction of γ-Nitro Ketones with Chalcones: Approach to Functionalized Six-Membered-Ring Carbocycles
作者:Lu Yu、Qingjing Yang、Pengfei Li
DOI:10.1002/ejoc.201403075
日期:2014.11
Dominoreactions between γ-nitroketones and chalcones for the construction of functionalizedsix-membered-ringcarbocycles using a phase-transfer catalyst have been developed. In the presence of tetrabutylammonium iodide and potassium hydroxide, dominoreactions between γ-nitroketones and a series of chalcones proceeded smoothly to give the cyclic products in moderate to high yields with high di