Base-Promoted Reactions of Bridged Ketones and 1,3- and 1,4-Haloalkyl Azides: Competitive Alkylation vs Azidation Reactions of Ketone Enolates
作者:Lei Yao、Brenton T. Smith、Jeffrey Aubé
DOI:10.1021/jo0356098
日期:2004.3.1
The reactions of 1,3- and 1,4-haloalkyl azides with enolates of 2-norbornanone (and a ring-expanded analog) afford polycyclic 1,2,3-triazolines in good yields. The reaction occurs by the initial azidation of the ketone enolate, followed in order by triazoline formation and O-alkylation. An interesting element of this process is the preferential reaction of the alkyl azide with an enolate anion as opposed
1,3-和1,4-卤代烷基叠氮化物与2-降冰片烷酮的烯酸酯(和扩环的类似物)反应可得到高产率的多环1,2,3-三唑啉。该反应通过酮烯醇酸酯的初始叠氮化而发生,随后依次是三唑啉形成和O-烷基化。该方法的一个有趣的元素是叠氮化物烷基与烯醇酸根阴离子的优先反应,而不是更常见的烷基卤化物(包括Cl和I衍生物)反应。无环或单环烯酸酯的反应通常产生1,2,3-三唑,但是没有可替代的C-烷基化产物。