Synthesis of dibenzo[b,d]furans through one-pot cascade reactions of 1-arylpenta-3,4-dien-2-ones with activated ketones
作者:Yan He、Shenghai Guo、Xinying Zhang、Chenhao Guo、Xuesen Fan
DOI:10.1016/j.tetlet.2015.01.179
日期:2015.3
One-pot cascade reaction of 1-arylpenta-3,4-dien-2-ones with activated ketones including base-promoted Michael addition/intramolecular aldol condensation/copper-catalyzed C–H activation and annulation offers a simple and convenient approach toward dibenzo[b,d]furans. This reaction obviates highly functionalized starting materials and step by step operations and affords products with good efficiency
New Six- to Eight-Membered-Ring Formation Based on the lntramolecular Endo-Mode Ring Closure of Allenyl (Substituted Phenyl)alkyl Ketones
作者:Yoshimitsu Nagao、Woo Song Lee、Yoichi Komaki、Shigeki Sano、Motoo Shiro
DOI:10.1246/cl.1994.597
日期:1994.3
Several allenyl ketones possessing an aryl group were submitted to a new intramolecular endo-mode cyclization with BF3·OEt2 or TiCl4 in CH2Cl2 to afford the corresponding 6-, 7-, and 8-membered carbocyclic products.