Modification of photochemical reactivity by cyclodextrin complexalion: product selectivity in photo-fries rearrangement
作者:M.S. Syamala、B.Nageswer Rao、V. Ramamurthy
DOI:10.1016/s0040-4020(01)86094-4
日期:1988.1
state and in aqueous solution brings about a remarkable regulation of the photo-Friesrearrangement of phenyl esters and anilides. In comparison to the nonselective mixture of ortho and para-rearranged isomers along with the deacylated product obtained in organic solvents, the solid β-cyclodextrin complexes of unsubstituted esters and anilides show a remarkable ‘ortho-selectivity’. An impressive regio-selectivity’
One-Pot Synthesis of 3,4-Disubstituted Coumarins under Catalysis of Mn3O4 Nanoparticles
作者:Huayin Sun、Yonghui Zhang、Fengfeng Guo、Yizhe Yan、Changfeng Wan、Zhenggen Zha、Zhiyong Wang
DOI:10.1002/ejoc.201101578
日期:2012.1
The one-potsynthesis of 3,4-disubstitutedcoumarins from substituted 2-(hydroxymethyl)phenols with β-keto esters catalyzed by Mn3O4nanoparticles was developed. A series of 3,4-disubstitutedcoumarin derivatives were obtained in good yields.