A Straightforward Hetero-Diels-Alder Approach to (2-<i>ambo</i>,4′<i>R</i>,8′<i>R</i>)-α/β/γ/δ-4-Thiatocopherol
作者:Stefano Menichetti、Riccardo Amorati、Maria Grazia Bartolozzi、Gian Franco Pedulli、Antonella Salvini、Caterina Viglianisi
DOI:10.1002/ejoc.200901493
日期:2010.4
A simple and original inverse electron demand hetero-Diels–Alder reaction has been successfully applied to the synthesis of (2-ambo,4′R,8′R)-α/β/γ/δ-4-thiatocopherol. Commercially available methyl hydroquinones and (2E,7R,11R)-(+)-phytol were exploited for the preparation of the ortho-thioquinones, acting as electron-poor dienes, and of the proper 1,3-diene used as dienophile, respectively. The benzoxathiine
一个简单而原始的逆电子需求杂-Diels-Alder反应已成功应用于(2-ambo,4'R,8'R)-α/β/γ/δ-4-硫代生育酚的合成。市售的甲基氢醌和 (2E,7R,11R)-(+)-phytol 分别用于制备邻硫醌类化合物(用作缺电子二烯)和适当的 1,3-二烯类用作亲二烯体. 在完全控制区域和化学选择性的情况下,获得了具有所需的类生育酚骨架的苯并沙西因环加合物。与维生素 E 的相应天然成分的抗氧化活性相比,4-硫代生育酚的抗氧化活性被测量和合理化。