A new route to some enantiomerically pure substituted morpholines from d-ribono- and d-gulono-1,4-lactones
作者:Khalil Bennis、Pierre Calinaud、Jacques Gelas、Mebrouk Ghobsi
DOI:10.1016/0008-6215(94)00190-1
日期:1994.11
cyclization compound which gave with tosyl chloride 1,4-anhydro-2,3- O -isopropylidene-5- O -trityl- d -ribitol. The latter was transformed (acid hydrolysis, periodate oxidation, reduction, tritylation, and tosylation) into a ditosylated derivative 16 , which was cyclized into morpholines by the action of primary amines. Acid hydrolysis, followed by acetylation, gives the (2 S )-acetoxymethyl-4-isopropyltetrahydro-1
摘要d -Ribono-1,4-内酯经缩醛化,三苯甲基化和还原后,生成环化化合物,该化合物与甲苯磺酰氯1,4-脱水-2,3-O-异亚丙基-5-O-三苯甲基-d生成-核糖醇。后者被转化(酸水解,高碘酸盐氧化,还原,三苯甲基化和甲苯磺酸化)成二甲苯磺酰化衍生物16,其在伯胺的作用下环化成吗啉。酸水解,然后乙酰化,得到(2S)-乙酰氧基甲基-4-异丙基四氢-1,4-恶嗪(21)。相似的序列已应用于d-古洛内酯,从而获得了恶嗪33、34和35。