A convenient synthesis of 4-amino-4-deoxy-l-arabinose and its reduction product, 1,4-dideoxy-1,4-imino-l-arabinitol
作者:John J. Naleway、Christian R.H. Raetz、Laurens Anderson
DOI:10.1016/0008-6215(88)84118-1
日期:1988.8
Methyl 2,3-di-O-acetyl-4-azido-4-deoxy-alpha-L-arabinopyranoside, from the diol, appears (1H-n.m.r. data) to exist as an equilibrating mixture of the 4C1 and 1C4 conformers in chloroform solution. The reduction of the azido sugar by hydrogen over Pd/C in .6M HCl yielded 4-amino-4-deoxy-L-arabinopyranose as its hydrochloride; in 0.1M HCl, further reactions occurred to give 1,4-dideoxy-1,4-imino-L-arabinitol
N-alkyl, N-hydroxylalkyl and N-alkanoyl derivatives of 1,4-dideoxy-1,4-imino-L-arabinitol are disclosed in which the alkyl group has from 4 to about 9 carbon atoms, the hydroxyalkyl group has from 2 to about 5 carbon atoms and the alkanoyl group has from 3 to about 12 carbon atoms. These compounds are useful intermediates for the preparation of acylated derivatives thereof which have antiviral activity.
Novel N-aryl derivatives of 1,4-dideoxy-1,4-imino-L-arabinitol and their acylated derivatives are disclosed. These compounds have useful antiviral activity.
Stereoselective Synthesis of 3,4-Dihydroxylated Prolines and Prolinols Starting from<scp>L</scp>-Tartaric Acid
作者:M. Oba、S. Koguchi、K. Nishiyama
DOI:10.1002/jhet.1634
日期:2014.1
A straightforward and stereoselectivesynthesis of 3,4‐dihydroxyprolines and 3,4‐dihydroxyprolinols is described. The key reaction in this synthesis is a protective group‐controlled diastereoselective cyanation of a chiral acyliminium intermediate derived from l‐tartaric acid. Methanolysis of the obtained cyanolactam gave methyl 3,4‐dihydroxypyroglutamate that was converted to 3,4‐dihydroxyproline
The synthesis from d-xylose of the potent and specific enantiomeric glucosidase inhibitors, 1,4-dideoxy-1,4-imino-d-arabinitol and 1,4-dideoxy-1,4-imin
作者:George W.J. Fleet、Paul W. Smith
DOI:10.1016/s0040-4020(01)88174-6
日期:1986.1
Bothenantiomers of 1,4-dideoxy-1,4-iminoarabinitol are specific inhibitors of glucosidases. The synthesis of 1,4-dideoxy-1,4-imino-D-arabinitol involves connecting C2 and C5 of xylose together with nitrogen, whereas the synthesis of 1,4-dideoxy-1.4-imino-L-arabinitol requires C1 and C4 of xylose to be joined together by nitrogen. 1,4-Dideoxy-1,4-imino-D-arabinitol is a naturally occurring pyrrolidine