New α-keto acid synthon; alkylation of the potassium dianion of bis(ethylthio)acetic acid
作者:Gordon S. Bates
DOI:10.1039/c39790000161
日期:——
The easily prepared, thermally stable, tetrahydrofuran-soluble potassiumdianion of the glyoxylic acid derivative (7) was readily alkylated by halides, tosylates, epoxides, and N-tosyl-aziridines.
Several α-mercaptoacetic and related acids were synthesized and the rates of the amine-catalysed decarboxylation were measured. In the carbanion-forming reaction, the α-mercapto group exhibits a dramatic rate-enhancement, due to the 3d-orbital resonance effect of the divalent sulphide group. For example, the rate of the decarboxylation of diphenylmercaptoacetic acid was 8·8 × 103 fold greater than that
[EN] VACCINES AGAINST STREPTOCOCCUS PNEUMONIAE SEROTYPE 4<br/>[FR] VACCINS CONTRE LE SÉROTYPE 4 DU STREPTOCOCCUS PNEUMONIAE
申请人:MAX PLANCK GES ZUR FÖRDERUNG DER WISSENSCHAFTEN E V
公开号:WO2016091399A1
公开(公告)日:2016-06-16
The present invention relates to synthetic saccharides of general formula (I) that are related to Streptococcus pneumoniae serotype 4 capsular polysaccharide and conjugates thereof. Said conjugate and a pharmaceutical composition containing said conjugate are useful for prevention and/or treatment of diseases associated with Streptococcus pneumoniae, and more specifically of diseases associated with Streptococcus pneumoniae serotype 4. Furthermore, the synthetic saccharides of general formula (I) are useful as marker in immunological assays for detection of antibodies against Streptococcus pneumoniae bacteria.
Vaccines against Streptococcus pneumoniae serotype 4
申请人:MAX-PLANCK-GESELLSCHAFT ZUR FÖRDERUNG DER WISSENSCHAFTEN E.V.
公开号:US10188718B2
公开(公告)日:2019-01-29
The present invention relates to synthetic saccharides of general formula (I) that are related to Streptococcus pneumoniae serotype 4 capsular polysaccharide and conjugates thereof. Said conjugate and a pharmaceutical composition containing said conjugate are useful for prevention and/or treatment of diseases associated with Streptococcus pneumoniae, and more specifically of diseases associated with Streptococcus pneumoniae serotype 4. Furthermore, the synthetic saccharides of general formula (I) are useful as marker in immunological assays for detection of antibodies against Streptococcus pneumoniae bacteria.