Synthesis of an Adenine Nucleoside Containing the (8′<i>R</i>) Epimeric Carbohydrate Core of Amipurimycin and Its Biological Study
作者:Rajendra S. Mane、Sougata Ghosh、Balu A. Chopade、Oliver Reiser、Dilip D. Dhavale
DOI:10.1021/jo102193q
日期:2011.4.15
The (8′R) epimeric carbohydrate core 2 of amipurimycin was synthesized from d-glucose derived allylic alcohol 3 in 11 steps and 13% overall yield. The key steps involve an acid-catalyzed acetonide ring opening of 9 with concomitant formation of an unprecedented pyranose ring skeleton to give 2,7-dioxabicyclo[3.2.1]octane 10. The α-orientation of the furan ring in 10 readily allows the stereoselective
所述(8' - [R )差向异构体的碳水化合物芯2 amipurimycin的合成自d葡萄糖衍生的烯丙醇3在11个步骤和13%的总收率。的关键步骤涉及酸催化的丙酮化合物开环9与伴随形成了前所未有的吡喃糖环骨架,得到2,7-二氧杂双环[3.2.1]辛烷的10。呋喃环在10中的α取向很容易实现呋喃糖环的立体选择性β-糖基化和打开,这在去除保护基团后即可得到吡喃糖基腺嘌呤核苷2。研究了2种的抗真菌和抗癌活性。