Studies on hindered phenols and analogs. 1. Hypolipidemic and hypoglycemic agents with ability to inhibit lipid peroxidation
摘要:
A series of hindered phenols were investigated as hypolipidemic and/or hypoglycemic agents with ability to inhibit lipid peroxidation. 1,3-Benzoxathioles (9 and 22), phenoxypentanoic acid (34), phenoxypentanol (35a), phenoxynonanol (35b), phenylchloropropionic acid having a chromanyl group (25), and a thiazolidine compound (27) derived from 25, all having a hindered phenol group, were prepared and examined. Compound 27 showed the expected biological properties in vivo and in vitro without any liver weight increase. Biological activities of the analogous thiazolidine compounds, 43-58, were compared. Thus, (+/-)-5-[4-[(6-hydroxy-2,5,7,8-tetramethylchroman-2-yl)methoxy]- benzyl]-2,4-thiazolidinedione (27) (CS-045) was found to have all of our expected properties and was selected as a candidate for further development as a hypoglycemic and hypolipidemic agent.
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。