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-Fries rearrangement 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’
固态和水溶液中的环糊精包封均对苯酯和苯胺的光-弗里斯重排产生了显着的调节作用。与在有机溶剂中获得的邻位和对位重排异构体的非选择性混合物以及脱酰产物相比,未取代的酯和酸酐的固体β-环糊精复合物表现出显着的“邻位选择性”。对于β-环糊精配合物,经辐照后的间位取代的酯和苯胺,在两个邻位重排的异构体中观察到了令人印象深刻的区域选择性。建议在β-环糊精腔中的未取代和间取代的酯和苯胺的特定方向是观察到的选择性的原因。