Vaccines against Streptococcus pneumoniae serotype 5
申请人:Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V.
公开号:US10596272B2
公开(公告)日:2020-03-24
The present invention relates to well-defined synthetic saccharides of general formula (I) that are related to the repeating unit of Streptococcus pneumoniae serotype 5 capsular polysaccharide and conjugates thereof. The conjugates and pharmaceutical compositions containing said conjugates are useful for prevention and/or treatment of diseases associated with Streptococcus pneumoniae, and more specifically against diseases associated with Streptococcus pneumoniae serotype 5. Furthermore, the synthetic saccharides of general formula (I) are useful as marker in immunological assays for detection of antibodies against Streptococcus pneumoniae bacteria.
Thermal CO extrusion from 2,3-dihydropyrrole-2,3-dione 3 generates imidoylketene 4, which cyclizes to 2-methoxy-4-quinolone (6). Using flash vacuum pyrolysis and low temperature IR spectroscopy, it is shown that 4 interconverts with ketenimine 5 prior to cyclization to 6.