A new route to 19-substituted steroids from 19-nor steroids: Sigmatropic [3,3] and [2,3] rearrangements revisited
作者:D. Lesuisse、F. Canu、B. Tric
DOI:10.1016/s0040-4020(01)85569-1
日期:1994.1
Sigmatropic [3,3] and [2,3] rearrangements of 11-substituted estradienedione derivatives gave rise to new 19-substituted androstenedione analogs.
11-取代的雌二烯酮衍生物的σ[3,3]和[2,3]重排产生了新的19-取代的雄烯二酮类似物。
Solid phase for use in a method for the purification of albumin conjugates
申请人:ConjuChem Biotechnologies Inc.
公开号:EP2100904A1
公开(公告)日:2009-09-16
A method for separating albumin conjugates from unconjugated albumin in a solution comprising albumin conjugates and unconjugated albumin by hydrophobic interaction chromatography (HIC). The solution is loaded onto the hydrophobic column equilibrated in aqueous buffer having a high salt content; applying to the column a gradient of decreasing salt concentration; and collecting the eluted albumin conjugates.
A method for separating albumin conjugates from unconjugated albumin in a solution comprising albumin conjugates and unconjugated albumin by hydrophobic interaction chromatography (HIC). The solution is loaded onto the hydrophobic column equilibrated in aqueous buffer having a high salt content; applying to the column a gradient of decreasing salt concentration; and collecting the eluted albumin conjugates.
The present invention relates to a method for separating albumin conjugate from unconjugated albumin in a solution comprising albumin conjugate and unconjugated albumin by loading the solution onto a hydrophobic support equilibrated in aqueous buffer having a high salt content; applying to the support a gradient of decreasing salt concentration; and collecting the eluted albumin conjugate.
Synthese von ?-Acetyl-?-methylenpolyencarbons�ureestern
作者:Hartmut Laatsch、Alke Pudleiner
DOI:10.1002/prac.19943360806
日期:——
The alpha-methylenpolyene carboxylic acids 1 and 2 are highly active against Gram-positive bacteria. If this activity arises from an interference with the cell membranes, then an abrupt change in biological properties is to be expected with growing chain length of simple model compounds. To make these tests possible, we describe here the synthesis of a series of homologue esters of type 40. Their synthesis was achieved by Wittig reactions of polyene alpha,omega-dialdehydes 6 with acetyl-methylentriphenylphosphoran 5a and the protected carboxymethylmethylen triphenylphosphonium salt 8.