Photocycloaddition of Four-Carbon-Tethered Pyridones. Intramolecular Hydrogen Bonding and Facilitated Amide Hydrolysis by a Proximal Secondary Alcohol<sup>1</sup>
作者:Man Zhu、Zhilei Qiu、Gary P. Hiel、Scott McN. Sieburth
DOI:10.1021/jo025565n
日期:2002.5.1
of a tether alcohol engenders a solvent-dependent diastereoselectivity for the cycloaddition by intramolecular hydrogen bonding to the adjacent pyridone. Following cycloaddition, the alcohol can deliver a carbonyl group to the proximal, hindered amide nitrogen, leading to a very facile amide hydrolysis.
四碳束缚的吡啶酮经历光环加成反应,只得到反式[4 + 4]产物。系链醇的存在通过与相邻的吡啶酮的分子内氢键键合而使环加成反应的溶剂依赖性非对映选择性。环加成后,该醇可将羰基传递至近端受阻酰胺氮,导致酰胺水解非常容易。