Chitinase Inhibitor Allosamidin and Its Analogues: An Update

Author(s): Gangliang Huang.

Journal Name: Current Organic Chemistry

Volume 16 , Issue 1 , 2012

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The pseudotrisaccharide allosamidin 1 is a potent family-18 chitinase inhibitor, and it demonstrates biological activities against insects, fungi, and the Plasmodium falciparum life cycle. Compound 1 contains two N-acetylhexosamine residues with the unusual D-allo-configuration and a novel aminocyclitol (i.e. allosamizoline 2), joined by two β-(1→4) glycosidic bonds. Many traditional syntheses of compounds 1-2 and their analogues have been reported. Herein, recent development for the synthesis of compounds 1-2 and their analogues was reviewed. Donohoe and Rosas approach to allosamizoline 2 involves a key-step ring-closing metathesis (RCM) to form the cyclopentene core followed by halocyclization to form the oxazoline unit. Rojas et al. reported that rhodium-catalyzed oxidative cyclization of glucal 3-carbamates led to oxazolidinone-protected mannosamine derivatives. Huang et al. described the solid-phase synthesis of allosamidin 1 and its analogues. The compound 1 and its analogues were obtained by iterative glycosylation reactions, catalytic hydrogenation, acetylation, and deacetylation, respectively. Withers and his co-workers research shows that chitobiose and chitotriose thiazolines exhibit chitinase inhibition activity. In a word, the goal is to investigate the novel methods for the synthesis of allosamidin and its analogues, which is convenient for the discovery of allosamidin analogues with high activity.

Keywords: Allosamidin, allosamizoline, analogues, synthesis, recent development, Plasmodium falciparum, ring-closing metathesis (RCM), iterative glycosylation reactions, acetylation, catalytic hydrogenation, deacetylation, chitinase inhibition activity, allosamidin analogues, pseudotrisaccharide, aminocyclopentitol moiety

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Article Details

Year: 2012
Page: [115 - 120]
Pages: 6
DOI: 10.2174/138527212798993121

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