Synthesis of peptide-morphinans based on Diels-Alder adducts of thebaine with enkephalin moieties (chemistry of opium alkaloids, Part XVI)
作者:H. C. Beyerman、T. S. Lie、L. Maat、M. Noordam-Weissdorf
DOI:10.1002/recl.19821011207
日期:——
The preparation of Diels-Alder adducts of (-)-thebaine and ethyl acrylate is described. Hydrolysis of the major adduct gave the 7α-carboxylic acid which was coupled with the ethyl esters of L-leucine, L-phenylalanyl-L-leucine and glycyl-L-phenylalanyl-L-leucine, respectively, three peptide segments derived from the endogenous opiate, leucine-enkephalin. These compounds, as well as the 7β-ethoxycarbonyl
描述了(-)-蒂巴因和丙烯酸乙酯的Diels-Alder加合物的制备。主要加合物的水解得到7α-羧酸,其分别与L-亮氨酸,L-苯丙氨酰基-L-亮氨酸和甘氨酰-L-苯丙氨酰基-L-亮氨酸的乙基酯偶联,这三个肽段均来自内源性鸦片,亮氨酸脑啡肽。将这些化合物以及7β-乙氧基羰基异构体进行O-脱甲基化,得到相应的3,6-二氢-木吗啡喃衍生物。N-(6,14-endo-Etheno-6,7,8,14-四氢茶碱-7α-羰基)-L-苯丙氨酰基-L-亮氨酸乙酯及其7,8-二氢吗啡类似物被还原为相应的亮氨酸。