[EN] POLYPEPTIDES, PEPTIDES, AND PROTEINS FUNCTIONALIZED BY ALKYLATION OF THIOETHER GROUPS VIA RING-OPENING REACTIONS [FR] POLYPEPTIDES, PEPTIDES ET PROTÉINES FONCTIONNALISÉ(E)S PAR ALKYLATION DE GROUPES THIOÉTHER VIA DES RÉACTIONS D'OUVERTURE DE CYCLE
Trifluoroacetylation of amines with trifluoroacetic acid in the presence of trichloroacetonitrile and triphenylphosphine
作者:Joong-Gon Kim、Doo Ok Jang
DOI:10.1016/j.tetlet.2009.11.105
日期:2010.1
We developed a mild and convenient trifluoroacetylation process for amines using a combination of trichloroacetonitrile and triphenylphosphine. The reaction that we designed is applicable to the trifluoroacetylation of a wide variety of amines, including amines with stereogenic centers, which underwent trifluoroacetylation without racemization.
SULPHUR-LINKED COMPOUNDS FOR TREATING OPHTHALMIC DISEASES AND DISORDERS
申请人:Scott Ian L.
公开号:US20100093865A1
公开(公告)日:2010-04-15
Provided are sulphur-linked compounds, pharmaceutical compositions thereof, and methods of treating ophthalmic diseases and disorders, such as age-related macular degeneration and Stargardt's Disease, using said compounds and compositions.
Octadienyl carbonates 5 provide cyclic 1,4-dienes 6 when treated with Rh1 complexes (1–10 mol-%) at 80°. Similar cyclization of cyclohexenyl acetate 8 affords cis- fused hexahydroindene 9. Analogous ring closures of nonadienyl carbonate 10 yield preferably the cis-divinypyrrolidine 11 with Rh1 catalysis but the trans-isomer 12 when catalyzed by Pd0. Azaoctadienyl carbonate 5a undergoes elimination
[EN] NUCLEIC ACID CHEMICAL MODIFICATIONS<br/>[FR] MODIFICATIONS CHIMIQUES D'ACIDE NUCLÉIQUE
申请人:ALNYLAM PHARMACEUTICALS INC
公开号:WO2010101951A1
公开(公告)日:2010-09-10
he present invention provides nucleosides of formula (1) and oligonucleotides comprising at least on nucleoside of formula (2): Another aspect of the invention relates to a method of inhibiting the expression of a gene in cell, the method comprising (a) contacting an oligonucleotide of the invention with the cell; and (b) maintaining the cell from step (a) for a time sufficient to obtain degradation of the mRNA of the target gene.
Synthesis of Deoxynucleoside Triphosphates that Include Proline, Urea, or Sulfonamide Groups and Their Polymerase Incorporation into DNA
作者:Marcel Hollenstein
DOI:10.1002/chem.201201662
日期:2012.10.15
and Pwo DNApolymerases, as well as the Klenow fragment of E. coli DNApolymerase I, although they were only acceptable substrates for the 9°Nm polymerase. All of the modified dNTPs, with the exception of dUBpuTP, were readily incorporated into DNA by the polymerase chain reaction (PCR). Modified oligonucleotides efficiently served as templates for PCR for the regeneration of unmodified DNA. Thermal
为了扩大在体外选择的背景下可用于DNA序列的化学阵列,我在此提出了五个含有能够进行有机催化的侧链的核苷三磷酸类似物的合成。合成过程涉及偶联含L-脯氨酸的残基(dU t P TP和dU c P TP),二肽(dU FP TP),尿素衍生物(dU Bpu TP)和磺酰胺残基(dU Bs TP)生成适当保护的普通中间体,然后进行三磷酸化。这些改性的dNTP被证明是用于通(优基板外型- )和的PwoDNA聚合酶以及大肠杆菌DNA聚合酶I的Klenow片段,尽管它们仅是9° N m聚合酶可接受的底物。除了dU Bpu TP外,所有修饰的dNTPs都可以通过聚合酶链反应(PCR)轻松地整合到DNA中。修饰的寡核苷酸有效地用作PCR模板,以再生未修饰的DNA。热变性实验表明,这些修饰在主凹槽中是可以容忍的。总体而言,这些经过大量修改的dNTP是SELEX的出色候选者。