Polyhydroxylated piperidines and azepanes from D-mannitol synthesis of 1-deoxynojirimycin and analogues
作者:Lydie Poitout、Yves Le Merrer、Jean-Claude Depezay
DOI:10.1016/s0040-4039(00)76888-2
日期:1994.5
D-mannitol and L-iditol bis-epoxides, easily obtained fromD-mannitol, are convenient substrates for the synthesis of polyhydroxylated piperidines and azepanes, via a nucleophilic opening of one epoxy function followed by a spontaneous intramolecular ring closure. Using this strategy 1-deoxynojirimycin and analogues were prepared.
Synthesis of azasugars. Part 1 isomerization of polyhydroxylated piperidines
作者:Lydie Poitout、Yves Le Merrer、Jean-Claude Depezay
DOI:10.1016/0040-4039(96)00096-2
日期:1996.3
and l-gulitol undergo easy isomerization, mainly either by ring contraction, or either by SN2 inversion at C2. This isomerization performed by bis-hydroxyl activation allows to access to 2,5-dideoxy-2,5-imino-l-iditol, 5-epi-DNJ, DMDP, and DMJ.
Synthesis of azasugars. Part 2 isomerization of polyhydroxylated azepanes
作者:Lydie Poitout、Yves Le Merrer、Jean-Claude Depezay
DOI:10.1016/0040-4039(96)00097-4
日期:1996.3
Isomerization of enantiopure C2-symmetric 3,5-dihydroxyazepane derivatives has been studied. The neighboring nitrogen participation occurs during mesylation to give a chloromethylpiperidine, whereas from the a chiral bridged morpholine structure (1R-(6endo, 7exo)-8-oxa-3-azabicyclo[3.2.1]octane-6,7-diol) is obtained under Mitsunobu conditions.