作者:M.Carmen Bernabeu、Rafael Chinchilla、Carmen Nájera、Miguel A Rodríguez
DOI:10.1016/0040-4039(96)00631-4
日期:1996.5
(2E)-4-Methoxy-2,4-pentadienamides have been stereoselectively prepared by treatment of (2E,4E)-5-tosyl-2,4-pentadienamides with IM methanolic potassium hydroxide in good yields. They behave as new electron-rich dienes in Diels-Alder reactions to give stereoselectively highly functionalized adducts 3 mainly with endo-selectivity and, after hydrolysis, only their corresponding cyclohexanone derivatives
通过用1M甲醇氢氧化钾处理(2 E,4 E)-5-甲苯磺酰基-2,4-戊二烯酰胺以高收率立体选择性地制备了(2 E)-4-甲氧基-2,4-戊二烯酰胺。它们在Diels-Alder反应中表现为新的富电子二烯,主要具有内选择性,并在水解后仅产生其相应的环己酮衍生物4,从而产生立体选择性高度官能化的加合物3。半经验计算证实了它们的反应性。