A Metal-Free Cycloaddition Approach to Highly Substituted Aromatic Boronic Esters
作者:Joseph P. Harrity、Jane E. Moore、Mark York
DOI:10.1055/s-2005-863727
日期:——
Alkynylboronates participate in [4+2] benzannulation reactions to furnish highly functionalised aromaticboronicesters, further manipulation of these boronicesters has been achieved via oxidation and Suzuki coupling reactions.
Cycloaddition behavior of unsymmetric cyclopentadienone. Peri- and regio-selectivities
作者:Tamaki Jikyo、Masashi Eto、Kazunobu Harano
DOI:10.1039/a804671i
日期:——
An asymmetrically substituted cyclopentadienone, 2-methoxycarbonyl-5-methyl-3,4-diphenylcyclopentadienone 1a, was synthesized and cycloadditions of compound 1a with various unsaturated compounds involving conjugated medium-ring polyenes were investigated. The cycloaddition behavior was analyzed by frontier molecular orbital (FMO) theory, indicating that the reactivity, stereo- and regio-selectivities observed are entirely consistent with the FMO predictions.