Hydrolysis of malonaldehyde dianil and .BETA.-arylaminoacrolein derivatives.
作者:SHINZO TAMURA、MACHIKO ONO、KAZUMI FURUYAMA
DOI:10.1248/cpb.28.2356
日期:——
The reversible hydrolysis of β-arylaminoacrolein to form arylamine and malonaldehyde was studied kinetically. The catalytic coefficient of hydronium ions (kH+) and dissociation constant of the conjugate acid of β-arylaminoacrolein (KBH+) were evaluated. Hammett plots for kH+ and for KBH+ were linear. The values of log kH+ and pKBH+ were expressed by the equations log kH+=1.38σ-2.81 and pKBH+=-1.20σ+0.90, respectively. The reversible hydrolysis of malonaldehyde dianil to form β-arylaminoacrolein and arylamine was examined in relation to that of β-arylaminoacrolein. The preparation of β-arylaminoacrolein by hydrolysis of malonaldehyde dianil was achieved under weakly acidic conditions.
Efficient reverse click labeling of azide oligonucleotides with multiple alkynyl Cy-Dyes applied to the synthesis of HyBeacon probes for genetic analysis
作者:Marta Gerowska、Lucy Hall、James Richardson、Montserrat Shelbourne、Tom Brown
DOI:10.1016/j.tet.2011.11.041
日期:2012.1
A convenient method of oligonucleotide labeling using click chemistry has been developed. A 2'-mesyloxyethyl ribothymidine phosphoramidite monomer was incorporated into DNA at several loci during solid phase oligonucleotide synthesis and converted to 2'-azidoethyl ribothymidine in high yield on the synthesis resin. The resultant azide oligonucleotides were doubly and triply labeled with alkynemodified cyanine dyes and their biophysical properties were studied. The influence of the dye structures and method of labeling on the fluorescence properties of the DNA probes is discussed and compared with a standard labeling method using active esters of Cy-Dyes. (C) 2011 Elsevier Ltd. All rights reserved.
[EN] NOVEL PROBES AND TARGETING COMOUNDS FOR MITOCHONDRIA<br/>[FR] NOUVELLES SONDES ET COMPOSÉS DE CIBLAGE DES MITOCHONDRIES