Birch Reductive Alkylation of Methyl <i>m</i>-(Hydroxymethyl)benzoate Derivatives and the Behavior of <i>o</i>- and <i>p</i>-(Hydroxymethyl)benzoates under Reductive Alkylation Conditions
作者:Samuel J. Fretz、Christopher M. Hadad、David J. Hart、Shubham Vyas、Dexi Yang
DOI:10.1021/jo301872n
日期:2013.1.4
Birch reductive alkylation of methyl m-(hydroxymethyl)benzoate derivatives, using lithium in ammonia–tetrahydrofuran in the presence of tert-butyl alcohol, can be achieved without significant loss of benzylic oxygen substituents. Similar treatment of o- and p-(hydroxymethyl)benzoate derivatives results largely in loss of benzylic oxygen substituents. The results are rationalized by computations describing
桦木甲基还原性烷基化米- (羟甲基)苯甲酸酯衍生物,在存在氨-四氢呋喃使用锂叔丁基醇,能够在不的苄氧取代基显著损失来实现。的类似的处理ö和- p - (羟甲基)苯甲酸酯衍生物结果在很大程度上在苄氧取代基的损失。通过描述涉及这些反应的假定的自由基阴离子中间体中的电子密度模式的计算使结果合理化。