摘要:
A process for the conversion of aristeromycin into cyclaradine via. The stereoselective reduction of a 3',5'-di-O-protected-2'-keto derivative of aristeromycin is disclosed.
摘要:
A novel sequence of highly selective chemical reactions for conversion of 3-Aryl-2-propyn-1-ols into cis-1-Aryl-3-fluoro-1-propene and into D,L-(threo)-1-Aryl-2-acylamido-3-fluoro-1-propanols is disclosed. Preparation of D-(threo)-1-Aryl-2-acylamido-3-fluoro-1-propanol antibacterial agents including the D-(threo)-3-fluoro-3-deoxy derivatives of chloramphenicol and thiamphenicol is also disclosed.
摘要:
Active recombinant human IL-4 is purified from a crude fermentation broth of a secreted E. coli mutant by subjecting said solution to selective chromatogrphy on a zinc-chelating agarose column at pH 7.2 in a buffer containing a high concentration of sodium chloride, i.e., about 1M sodium chloride, washing first with a phosphate buffer at pH 7.2 containing 1.0M sodium chloride then with a buffer containing 10% glycerol and eluting at pH 5.0. The resulting purified active recombinant human IL-4 solution is further treated by cation exchange chromatography, concentration by diafiltration up to 20 mg/mL and size exclusion gel chromatography using a citrate buffer at pH 4.5.
摘要:
A novel sequence of highly selective chemical reactions for conversion of 3-Aryl-2-propyn-1-ols into cis-1-Aryl-3-fluoro-1-propene and into D,L-(threo)-1-Aryl-2-acylamido-3-fluoro-1-propanols is disclosed. Preparation of D-(threo)-1-Aryl-2-acylamido-3-fluoro-1-propanol antibacterial agents including the D-(threo)-3-fluoro-3-deoxy derivatives of chloramphenicol and thiamphenicol is also disclosed.
摘要:
A novel sequence of highly selective chemical reactions for conversion of 3-Aryl-2-propyn-1-ols into cis-1-Aryl-3-fluoro-1-propene and into D,L-(threo)-1-Aryl-2-acylamido-3-fluoro-1-propanols is disclosed. Preparation of D-(threo)-1-Aryl-2-acylamido-3-fluoro-1-propanol antibacterial agents including the D-(threo)-3-fluoro-3-deoxy derivatives of chloramphenicol and thiamphenicol is also disclosed.