Syntheses of 5′-Nucleoside Monophosphate Derivatives with Unique Aminal, Hemiaminal, and Hemithioaminal Functionalities: A New Class of 5′-Peptidyl Nucleotides
A number of synthetically useful transformations have been developed to generate novel 5′‐peptidyl nucleosidemonophosphate analogues that incorporate sensitive phosphoaminal, ‐hemiaminal or ‐hemithioaminal functionalities. The strategies adopted entailed the coupling between dipeptides, which enclose a reactive Cα‐functionalized glycine residue and phosphate or phosphorothioate moieties. These developments
An Efficient Synthesis of Pyrimidine Specific 2′-Deoxynucleoside-5′-Tetraphosphates
作者:Anilkumar R. Kore、Zejun Xiao、Annamalai Senthilvelan、Irudaya Charles、Muthian Shanmugasundaram、Sriram Mukundarajan、Balasubramanian Srinivasan
DOI:10.1080/15257770.2012.703358
日期:2012.7
An efficient chemical synthesis of pyrimidine specific 2′-deoxynucleoside-5′-tetraphosphates, such as 2′-deoxycytidine-5′-tetraphosphate (dC4P) and thymidine-5′-tetraphosphate (T4P) is described. The present three-step synthetic strategy involves monophosphorylation of 2′-deoxynucleoside using phosphorous oxychloride, conversion of 5′-monophosphate into the corresponding imidazolide salt, followed
Avermectin (AVM) refers to eight macrolides containing a common l-oleandrosyl disaccharide chain indispensable to their antiparasitic bioactivities. We delineated the biosynthetic pathway of TDP-β-l-oleandrose (1), the sugar donor of AVM, by characterizing AveBVIII, AveBV, and AveBVII as TDP-sugar 3-ketoreductase, 5-epimerase, and 3-O-methyltransferase, respectively. On the basis of this pathway, we
Avermectin (AVM) 是指八种大环内酯类化合物,含有对其抗寄生虫生物活性必不可少的常见l-夹竹桃基二糖链。我们划定TDP-β的生物合成途径-l -oleandrose(1),AVM的糖供体,通过表征AveBVIII,AveBV和AveBVII作为TDP-糖-3-酮还原酶,5差向异构酶,和3- Ò -methyltransferase,分别。在这个途径的基础上,我们成功重组的生物合成1的大肠杆菌。我们的工作完成了AVM的生物合成途径,为进一步的研究奠定了坚实的基础。
A Methodological Comparison: The Advantage of Phosphorimidates in Expanding the Sugar Nucleotide Repertoire
作者:Yongxin Zhao、Jon S. Thorson
DOI:10.1021/jo981265n
日期:1998.10.1
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作者:I. Yu. Garipova、V. N. Silnikov
DOI:10.1023/a:1021329324527
日期:——
The reactions of histamine, the natural dipeptide carcinine (beta-Ala-HA), and its analogs with 5'-monodeoxyribonucleotides (dNMP) in the presence of triphenylphosphine, 2,2'-dipyridyl disulfide, and N-methylimidazole were studied. The yield of phosphamide derivatives decreases from 72% to 17% as the length of the linker group between the imidazole ring and the terminal aliphatic amino group is increased. Hydrolytic stability of the resulting conjugates was examined. The stability of the bonds in the -O-P(O)(2)-NH- group linking the nucleotide and peptide portions of the conjugate depends on the nature of the heterocyclic base of the nucleotide and decreases in the series dTMP > dCMP > dAMP.