Experimental and theoretical study of the 1,3-dipolar cycloaddition between d-glyceraldehyde nitrones and acrylates. Diastereoselective approach to 4-hydroxy pyroglutamic acid derivatives
作者:Pedro Merino、Juan A. Mates、Julia Revuelta、Tomas Tejero、Ugo Chiacchio、Giovanni Romeo、Daniela Iannazzo、Roberto Romeo
DOI:10.1016/s0957-4166(02)00088-5
日期:2002.2
The 1,3-dipolar cycloaddition reactions of five d-glyceraldehyde nitrones with alkyl acrylates and Oppolzer's sultam acrylamide have been studied in detail, the study including double chiral induction experiments. A complete theoretical study of the reaction has also been carried out using density functional methods (B3LYP/6-31G*) in which both ortho and meta channels leading to 3,5- and 3,4-disubstituted
详细研究了五个d-甘油醛硝基与丙烯酸烷基酯和Oppolzer's sultam丙烯酰胺的1,3-偶极环加成反应,该研究包括双手性诱导实验。还使用密度泛函方法(B3LYP / 6-31G *)对反应进行了完整的理论研究,其中考虑了分别导致3,5-和3,4-二取代的异恶唑烷的邻位和间位通道。由环加成反应获得的加合物已进一步用于受保护的4-羟基焦谷氨酸,特别是(2 S,4 S)-异构体的立体选择性合成,其是由环加成反应的主要加合物制备的。