The Journal of antibiotics, 49(1), 61-64 (1996-01-01)
Inhibitory activities of A-72363 A-1, A-2 and C, the diastereomers of a neuraminidase inhibitor siastatin B, against various glycosidases were tested in comparison to siastatin B. Despite these compounds differing only in their configuration, each compound showed strikingly different specificities
[reaction: see text] 6-Acetamido-5-amino- and -5-guanidino-3, 4-dehydro-N-(2-ethylbutyryl)-3-piperidinecarboxylic acids (8 and 9) have been synthesized starting from natural siastatin B, a bacterial neuraminidase inhibitor isolated from Streptomyces culture in a stereospecific fashion. These compounds are related to zanamivir and oseltamivir, inhibitors
The Journal of antibiotics, 45(6), 963-970 (1992-06-01)
Siastatin B analogues, optically active 2-(trifluoroacetamide)- 3,4,5-trihydroxypiperidines having nitromethyl, aminomethyl and carboxyl branched groups at C-5, and (+)-(2R,3R,4R,5R)-5-(aminomethyl)-3,4,5-trihydroxy-2- (hydroxyacetamido)piperidine have been obtained total synthetically from D-ribono-1,4-lactone. Some analogues have inhibitory activity against some glycosidases, and (+)-(2R,3R,4R,5R)-2-(trifluoroacetamido)-3,4,5-trihydroxypiperi dine-5-carboxylic acid showed a
[structure] The resolved piperidinecarboxylate (R)-7 was converted to siastatin B (1) by an efficient and stereoselective sequence that includes a bromo-beta-lactonization and an N-acyliminium azidation. Two analogues (3 and 4) of siastatin were also prepared.
A practical synthesis from siastatin B of (3S,4S,5R,6R)- 4,5-dihydroxy-6-(trifluoroacetamido)piperidine-3-carboxylic acid having antimetastatic activity in mice.
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