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The moenomycins A and C 1 as well as penta-, di- and monosaccharide analogues have been conjugated to BSA and biotin, respectively. The moenomycin A–BSA conjugates have been used to raise polyclonal antibodies. It has been demonstrated that the antisera recognize moenomycin A.
The cascade 1,3-azaprotiocyclotransfer (1,3-APT)-1,3-dipolar-cycloaddition (1,3-DC) reaction between aldoximes and divinyl ketone affords mixtures of exo and endo -isomers of substituted 1-aza-7-oxabicyclo(3.2.1)octan-4-ones, the ratio of which is dependent on the E / Z geometry of the starting...
In the present study, 4-thiazolidinones have been assembled by DCC mediated three-component reaction of amine, aldehyde and mercaptoacetic acid. The final compounds are obtained in quantitative yields within one hour.
Chlorination of 2,1-benzisothiazoline 2,2-dioxides (benzosultams) with hexachloroethane under phase-transfer catalysis condition in the presence of 50% aqueous NaOH and tetraalkylammonium salt gives 3,3-dichlorobenzosultams in good yields. Thermal extrusion of SO 2 from 3,3-dichloropyridosultams...
An enantioselective first total synthesis of a constituent of Croton linearis , the (−)-7-hydroxy-3,10-prenylbisaboladien-2-one 1 , is described as well as the syntheses of the 7-hydroxy-3,10-bisaboladien-2-ones (−)- epi -delobanone ( 14a ) and (−)-delobanone ( 14b ). The model compounds,...
Protected α-hydroxy carboxylic acids were synthesized in moderate yield and high diastereoselectivity by alkylation of glycolate (α-hydroxy acetate) enolates using a d -fructose-derived chiral auxiliary. The new chiral center was assigned the R configuration based on comparisons of optical...
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