Nucleoside analogues of uridine, 5-bromo-, 5-iodo-, and 5-fluorouridines, thymidine and cytidine were prepared by condensing appropriately substituted 2,4-dimethoxypyrimidines with an acyclic side chain in the form of a benzoylated halo-ether, and subsequent removal of the protecting benzoyl group in base. The 2′-O-p-tosylates of these nucleoside analogues could then be modified to 2′-halo-, azido-
Alkynylamino-nucleotides and labeled alkynylaminonucleotides useful, for example, as chain terminating substrates for DNA sequencing are provided along with several key intermediates and processes for their preparation. For some applications, longer, hydrophilic linkers are provided.
Bis(trimethylsilyl)pyrimidine bases were treated directly with 1, 3-dioxolane (or 2-methyl-1, 3-dioxolane), chlorotrimethylsilane and a metal iodide, such as KI or NaI, in acetonitrile at room temperature to afford acylopyrimidine derivatives, including 2-thiopyrimidine derivatives, in good yields. Introduction of an acyclic chain into 2-thiopyrimidine bases, however, necessitated the use of 2 eq of the reagents.
Pyrimidine acyclic nucleosides. 1-[(2-Hydroxyethoxy)methyl]pyrimidines as candidate antivirals
作者:James L. Kelley、John E. Kelsey、William R. Hall、Mark P. Krochmal、Howard J. Schaeffer
DOI:10.1021/jm00138a022
日期:1981.6
A number of pyrimidine acyclicnucleosides were synthesized and tested for activity against herpes simplex virus type 1. Synthesis of 1-[(2-hydroxyethoxy)methyl]cytosine (8) and 1-[(2-hydroxyethoxy)methyl]uracil (14) was accomplished in two or three steps from 2,4-diethoxypyrimidine and 2-(benzoyloxy)ethoxymethyl chloride. The 5-methyl (20), 5-(trifluoromethyl) (21), and 5-fluoro (22) analogues of
Ringöffnungvon 1,3‐Dioxolan und von3‐Alkyl‐1,3‐oxazolidinen mit Acetylchlorid oder Trimethyliodsilan führt zu den α‐Halogenethern 2a—2e. Diese stellen Alkylierungsreagenzien dar. Ihre Umsetzung mit Adenin, 6‐Chlorpurin oder silyliertem Cytosin bzw. silylierten Uracilderivaten gibt die 2‐Hydroxyethoxymethyl‐ bzw. 2‐Acetamidoethoxymethylverbindungen 4, 5 und 7..