Synthesis and Duplex-Stabilizing Properties of Fluorinated<i>N</i>-Methanocarbathymidine Analogues Locked in the C3′-<i>endo</i>Conformation
作者:Michael E. Jung、Timothy A. Dwight、Frederic Vigant、Michael E. Østergaard、Eric E. Swayze、Punit P. Seth
DOI:10.1002/anie.201405283
日期:2014.9.8
The efficient synthesis, antiviral activity, and duplex‐stabilizing properties of both isomers of the 2′‐fluoro analogue of Northern methanocarbathymidine (N‐MCT), 2 and 3, are reported. We show that 2′‐F incorporation on the N‐MCT scaffold has a strong stabilizing effect on duplex thermal stability.
Enantiomeric Synthesis of <scp>l</scp>-(or 1‘<i>R</i>,2‘<i>S</i>)-Carbocyclic Cyclopropyl Nucleosides
作者:Mi Gyoung Lee、Jin Fa Du、Moon Woon Chun、Chung K. Chu
DOI:10.1021/jo961523l
日期:1997.4.1
which was then converted to the ureaderivative 5 and cyclopropylamine 7 by Curtiusrearrangement of an acyl azide. The urea intermediate 5 was utilized to prepare thymine 10, uracil 11, and cytosine 14 derivatives. The hypoxanthine, adenine, and guanine nucleosides 21, 22, and 24 were synthesized from the amino intermediate 7.
Oligonucleotides containing enantiomeric carbocyclic oxetanocins possessing adenine, thymine, guanine and cytosine were synthesized from an optically active cyclobutane derivative. Their hybridizationproperties with the complementary oligonucleotides were studied using melting point method, CD spectroscopy, and mixing curve method (Job plots). The artificial nucleotides possessing adenine, guanine
从具有光学活性的环丁烷衍生物合成含有对映体碳环氧etanocins的寡核苷酸,该对映体具有腺嘌呤,胸腺嘧啶,鸟嘌呤和胞嘧啶。使用熔点法,CD光谱法和混合曲线法(乔布图)研究了它们与互补寡核苷酸的杂交特性。具有腺嘌呤,鸟嘌呤和胞嘧啶碱基的人工核苷酸显示出比脱氧核糖核苷酸更容易与核糖核苷酸形成复合物的趋势。这些复合物是由嘌呤和嘧啶以1:2的比例组成的三链体。在高(1 M NaCl)和低盐(0.1 M NaCl)条件下都观察到了这种三链体的形成。
Conformationally locked bicyclo[4.3.0]nonane carbanucleosides: synthesis and bio-evaluation
作者:Tony K. M. Shing、Anthony W. H. Wong、Huiyan Li、Z. F. Liu、Paul K. S. Chan
DOI:10.1039/c4ob01763c
日期:——
D-Ribose was converted into 3 novel carbobicyclic nucleosides bearing a bicyclo[4.3.0]nonane framework in 16–19 steps with 5–12% overall yields involving a Wittig olefination and an intramolecular Diels–Alder reaction as the key steps. The present synthesis also provides an efficient entry for chiral hydrindenones. The conformation studies of these carbanucleosides and their bio-evaluation as potential
Synthesis of enantiomerically pure cyclopropyl carbocyclic nucleosides
作者:Yufen Zhao、Te-Fang Yang、Migyoung Lee、Byoung K. Chun、Jinfa Du、Raymond F. Schinazi、Doowon Lee、M.Gary Newton、Chung K. Chu
DOI:10.1016/s0040-4039(00)73511-8
日期:1994.7
The enantiomericsynthesis of cyclopropyl carbocyclic nucleosides has been achieved and the key intermediate was characterized by X-ray crystallography.