Acid-Catalyzed Degradation of Clarithromycin and Erythromycin B: A Comparative Study Using NMR Spectroscopy
作者:Mohd N. Mordi、Michelle D. Pelta、Valerie Boote、Gareth A. Morris、Jill Barber
DOI:10.1021/jm9904811
日期:2000.2.1
of the antibiotic erythromycin A is its extreme acid sensitivity, leading to degradation in the stomach following oral administration. The modern derivative clarithromycin degrades by a different mechanism and much more slowly. We have studied the pathway and kinetics of the acid-catalyzed degradation of clarithromycin and of erythromycin B, a biosynthetic precursor of erythromycin A which also has
Synthesis of <scp>l</scp>-Cladinose
Using Enantioselective Desymmetrization
作者:Sung Kang、Hyoung Kim、Joo-Hack Youn
DOI:10.1055/s-2008-1078046
日期:——
l-Cladinose, a neutral sugar found in erythromycins and azithromycins, has been synthesized efficiently using enantioselective monobenzoylation of 2-propenylglycerol in the presence of the imine-CuCl2 catalysts to elaborate the stereogenic quaternary center.
The synthesis of L-()-mycarose and L-()-cladinose
作者:D.M. Lemal、P.D. Pacht、R.B. Woodward
DOI:10.1016/0040-4020(62)80009-x
日期:1962.1
Synthesis of cladinose from mycarose and synthesis of the same methylated derivative, 3,4-di-O-methylmycarose, from both mycarose and cladinose demonstrated the configurational identity of the two sugars. The synthesis of dl-mycarose and its 3-epimer by methods which reveal their configurations is described. Synthetic racemic mycarose was resolved via its bornanol-10-sulfonates and the active synthetic
Stoffwechselprodukte von Actinomyceten. 33. Mitteilung. Hydrolyseprodukte von Lankamycin: Lankavose und 4-O-Acetyl-arcanose
作者:W. Keller-Schierlein、G. Roncari
DOI:10.1002/hlca.19620450118
日期:——
Das Antibioticum Lankamycin gibt bei der Hydrolyse die beiden Zucker Lankavose und 4-O-Acetyl-arcanose sowie das Aglykon Monoacetyllankolid. Lankavose besitzt die Konstitution eines 2,5-Dihydroxy-3-methoxy-hexanal-cyclohalbacetals (Ib); Acetylarcanose diejenige eines 4-Acetoxy-5-hydroxy-3-methoxy-3-methyl-hexanal-cyclohalbacetals (IXb).
[EN] PROCESS FOR THE PRODUCTION OF TELITHROMYCIN<br/>[FR] PROCÉDÉ DE FABRICATION DE TÉLITHROMYCINE
申请人:SANDOZ AG
公开号:WO2009053259A1
公开(公告)日:2009-04-30
The present invention relates to a process for the preparation of erythromysin derivatives, in particular telithromycin of formula (I) and its pharmaceutically acceptable salts, providing the isolated intermediates in crystalline form of superior stability and purity.