Monocyclic L-Nucleosides, analogs and uses thereof
申请人:ICN Pharmaceuticals, Inc.
公开号:US06130326A1
公开(公告)日:2000-10-10
Novel monocyclic L-Nucleoside compounds have the general formula ##STR1## Embodiments of these compounds are contemplated to be useful in treating a wide variety of diseases including infections, infestations, neoplasms, and autoimmune diseases. Viewed in terms of mechanism, embodiments of the novel compounds show immunomodulatory activity, and are expected to be useful in modulating the cytokine pattern, including modulation of Th1 and Th2 response.
Synthesis of a Ribose-Incorporating Medium Ring Scaffold via a Challenging Ring-Closing Metathesis Reaction
作者:Stuart S. Rankin、John J. Caldwell、Nora B. Cronin、Rob L. M. van Montfort、Ian Collins
DOI:10.1002/ejoc.201600756
日期:2016.9
1]undecenetriol useful as a medicinal chemistry scaffold has been developed starting from l‐ribose. The sequence involves an oxidation/Grignard addition sequence and a challenging ring‐closing metathesis (RCM) reaction as the ring forming step. Exploration of the RCM substrate protecting groups revealed the key factor for successful nine‐membered medium ring formation to be conformational bias of the reacting
Monocyclic L-nucleosides, analogs and uses thereof
申请人:ICN Pharmaceuticals, Inc.
公开号:EP1254911A1
公开(公告)日:2002-11-06
Novel monocyclic L- nucleoside compounds have general formula (I). Embodiments of these compounds are contemplated to be useful in treating a wide variety of diseases including infections, infestations, neoplasms, and autoimmune diseases. Viewed in terms of mechanism, embodiments of the novel compounds show immunomodulatory activity, and are expected to be useful in modulating the cytokine pattern, including modulation of Th 1 and Th 2 response.
approach for the synthesis of 1,2,3,5-tetraacetylcarba-alpha-D-lyxofuranose from D-ribose is reported via one-pot conversion of to usingTebbe reagent which involves a cascade reaction sequence of methylenation, cleavage of isopropyl group, carbocyclization and again methylenation.
Acetonation of l-pentoses and 6-deoxy-l-hexoses under kinetic control using heterogeneous acid catalysts
作者:Jonas J. Forsman、Reko Leino
DOI:10.1016/j.carres.2010.05.002
日期:2010.7
H+ proved to be an efficient catalyst for the preparation of O-isopropylidene derivatives from a series of rare sugars. Acetonation of the reducing sugars L-arabinose, L-ribose, L-xylose, L-fucose, and L-rhamnose in N,N-dimethylformamide by 2,2-dimethoxypropane or 2-methoxypropene led to the formation of the kinetically favored di-O- and/or mono-O-isopropylidene derivatives in 46-88% yields. The method
纤维状聚合物负载的磺酸催化剂Smopex-101 H +被证明是从一系列稀有糖中制备O-异亚丙基衍生物的有效催化剂。N,N-二甲基甲酰胺中的还原糖L-阿拉伯糖,L-核糖,L-木糖,L-岩藻糖和L-鼠李糖的乙酰化作用是由2,2-二甲氧基丙烷或2-甲氧基丙烯引起的-O-和/或单-O-异亚丙基衍生物,产率为46-88%。该方法由简单的实验程序组成,不需要预先干燥的溶剂或试剂。该催化剂易于回收并且可以再生,从而使得该方法即使对于大规模合成也在经济上可行。