有关 Reformatsky反映的一点疑问? Reformatsky Reaction The formation of ester-stabilized organozinc reagents and their addition to carbonyl compounds Mechanism of the Reformatsky Reaction Organozinc compounds are prepared from α-halogenesters in the same manner as Grignard Reagents. This reaction is possible due to the stability of esters against organozincs. Due to the very low basicity of zinc enolates, there is hardly any competition from proton transfer, and the scope of carbonyl addition partners is quite broad. In presence of ketones or aldehydes, the organozinc compounds react as the nucleophilic partner in an addition to give β-hydroxy esters. 查看更多13个回答 . 2人已关注
afford在这个句子中,怎么翻译呢? Optimization using the Box-Wilson method with hydrogenation rate as objective function and ee > 90% as boundary condition afforded a site–time–yield . 绿色字体部分是什么意思呢? 查看更多6个回答 . 5人已关注