Asymmetric synthesis of both enantiomers of α-methyl-α-methoxyphenylacetic acid from l-(+)-tartaric acid: formal enantioselective synthesis of insect pheromone (−)-frontalin
作者:Kavirayani R. Prasad、Appayee Chandrakumar、Pazhamalai Anbarasan
DOI:10.1016/j.tetasy.2006.07.007
日期:2006.8
Both antipodes of α-methyl-α-methoxyarylacetic acid derivatives were prepared from a common chiralpool precursor l-(+)-tartaric acid. The key step involves the addition of Grignard reagents to 1,4-diketones derived from tartaric acid. The utility of this strategy was applied in the formal enantioselective synthesis of pine beetle pheromone (−)-frontalin.
α-甲基-α-甲氧基芳族酸衍生物的两种对映体均由常见的手性池前体1-(+)-酒石酸制备。关键步骤涉及将格氏试剂添加到由酒石酸衍生的1,4-二酮中。该策略的效用被应用于松甲虫信息素(-)-额叶蛋白的正式对映选择性合成中。