Asymmetric synthesis of novel polyhydroxylated derivatives of indolizidine and quinolizidine by intramolecular 1,3-dipolar cycloaddition of N-(3-alkenyl)nitrones
作者:Piotr Gębarowski、Wojciech Sas
DOI:10.1039/b101057n
日期:——
Reaction of
3-O-benzyl-1,2-O-isopropylidene-1,5-pentadialdo-α-
D-xylofuranose with
N-(1,1-dimethylbut-3-enyl)hydroxylamine followed by intramolecular
1,3-dipolar cycloaddition yields 7-oxa-1-azabicyclo[2.2.1]heptane
derivative 4, which is easily converted into novel polyhydroxylated
quinolizidine 6 and indolizidine 8.
3-O-苄基-1,2-O-异亚丙基-1,5-戊二烯并-α-D-氧基呋喃糖与 N-(1,1-二甲基丁-3-烯基)羟基胺反应,然后进行分子内 1,3-二极环加成,得到 7-氧杂-1-氮杂双环[2.2.1]庚烷衍生物 4,很容易将其转化为新型多羟基喹嗪 6 和吲嗪 8。