A comprehensive review on natural occurrence, synthesis and biological activities of glycolipids.

Glycolipids are ubiquitous and biologically important molecules and are involved in diverse biological functions and exhibit biosurfactant applications due to their surface-active and biodegradability properties. Despite showing a wide range of biological functions, not enough commercial exploitation has been taken place. Possible reasons for this could be the lack of focus or commercially viable processes for isolation/purification, as these glycolipids are found to be complex mixtures in their respective natural sources.

Synthesis and biological evaluation of 5-fatty-acylamido-1, 3, 4-thiadiazole-2-thioglycosides.

In the present study, the synthesis of 1, 3, 4-thiadiazole-based thioglycosides were accomplished in good yields with employing a convergent synthetic route. The starting material 5-amino-1, 3, 4-thiadiazole-2-thiol and followed by a series of 5-fatty-acylamido-1, 3, 4-thiadiazole-2-thiols (4a-4j) were synthesized with different fatty acid chlorides. The glycosylation of compounds 4a-4j were achieved with trichloroacetimidate methodology.

Synthesis of dihydrosterculic acid-based monoglucosyl diacylglycerol and its analogues and their biological evaluation.

In the present study, Lactobacillus plantarum glycolipid (GL1) molecule in β-configuration and its fatty acid analogues were synthesized using trichloroacetimidate methodology. The β-configuration of the GL1 molecule was unambiguously assigned by NMR studies using 2D-ROESY (NOE) and J-coupling analysis. Dihydrosterculic acid was synthesized using Furukawa's reagent and the selective esterification of dihydrosterculic acid at C-3 position of glycerol was achieved with EDC-HCl at 0 °C.