Synthesis of Enantiopure Trifluoromethyl Building Blocks via a Highly Chemo- and Diastereoselective Nucleophilic Trifluoromethylation of Tartaric Acid-Derived Diketones
作者:Fabien Massicot、Nicolas Monnier-Benoit、Naba Deka、Richard Plantier-Royon、Charles Portella
DOI:10.1021/jo062016z
日期:2007.2.1
acid-based diketone, using trifluoromethyl(trimethyl)silane, afforded the corresponding γ-keto trifluoromethylcarbinol. The scope and limitation of this reaction was studied. The acidic removal of the acetonide moiety protecting the two hydroxyl groups of the adducts was unsuccessful. Bis(O-methylation) of the aromatic derivatives under basic conditions, followed by acidic hydrolysis and oxidative cleavage
基于酒石酸的二酮的高度非对映选择性亲核性单(三氟甲基化),使用三氟甲基(三甲基)硅烷,得到了相应的γ-酮基三氟甲基甲醇。研究了该反应的范围和局限性。酸性除去保护加合物的两个羟基的丙酮化物部分是不成功的。在碱性条件下,芳族衍生物的双(O-甲基化),然后进行酸性水解和氧化裂解,产生两种不同的对映体纯产物:α-芳基-α-甲氧基-α-三氟甲基乙醛和α-芳基-α-甲氧基羧酸。最终,整个过程是将一种天然手性原料转化为两种功能化的对映纯结构单元(包括三氟甲基单元)的有趣方法。