23392-16-7Relevant academic research and scientific papers
NEW PRODUCTION METHOD FOR PYRIMIDINE NUCLEOSIDE DERIVATIVES
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Paragraph 0040; 0060, (2018/10/31)
PROBLEM TO BE SOLVED: To provide a method for producing pyrimidine nucleoside derivatives with excellent handleability. SOLUTION: A glycosyl donor of which OH groups at positions 1 and 2 are acylated and other OH groups are protected and a silylated pyrimidine derivative are reacted in the presence of an acid azole/pyridine conjugate of the following general formula (1) or (2) and a solvent. Acid azole/pyridine conjugate is excellent in handleability because it has no or low hygroscopicity. In the formula (1), A is -O- or -S-, in the formulae (1) and (2), R1-R8 are hydrocarbon groups which may be substituted, R1-R8 may form a ring by binding to other R1-R8, the acid azole/pyridine conjugate may comprise plurality of formula (1) and/or formula (2) as partial structures. Further, it may be bonded to a carrier via R1-R8. COPYRIGHT: (C)2015,JPO&INPIT
Synthesis of modified pyrimidine nucleosides via Vorbrüggen-type N-glycosylation catalyzed by 2-methyl-5-phenylbenzoxazolium perchlorate
Shirouzu, Hiroshi,Morita, Hiroki,Tsukamoto, Masaki
supporting information, p. 3635 - 3639 (2014/05/20)
Several acidic azolium salts prepared from oxazole, thiazole, and imidazole derivatives were investigated as catalysts in N-glycosylation reaction using a silylated modified pyrimidine and an acylated ribose or glucose to afford the corresponding pyrimidine nucleoside. Among the salts, 2-methyl-5- phenylbenzoxazolium perchlorate showed the highest catalytic activity. This salt is a nonhygroscopic crystalline compound that shows higher activity than the frequently used trimethylsilyl triflate. Reactions with this salt can be conducted in gram scales.
One-flow, multistep synthesis of nucleosides by Bronsted acid-catalyzed glycosylation
Sniady, Adam,Bedore, Matthew W.,Jamison, Timothy F.
supporting information; experimental part, p. 2155 - 2158 (2011/04/23)
Nucleosides in flow: A general, scalable method of Bronsted acid-catalyzed nucleoside formation is described. Because of the high reaction temperatures readily available to the flow reaction format, mild Bronsted acids, particularly pyridinium triflates, can be used. A one-flow multistep synthesis of unprotected nucleosides is also reported (see scheme).
Nitrogen glycosylation reactions involving pyrimidine and purine nucleoside bases with furanoside sugars
Wilson,Hager,El-Kattan,Liotta
, p. 1465 - 1479 (2007/10/02)
Different approaches for the synthesis of nucleoside analogs (potential HIV inhibitors) are described. Starting from a suitably substituted furanose ring, it is demonstrated that a high facial stereocontrol of the glycosylation reaction can be effected. Different reaction conditions including Lewis acid promoted, S(N)2 displacement and some enzymatic methodologies for the stereoselective synthesis of these compounds are reviewed.
Nucleoside Syntheses, XXII. Nucleoside Synthesis with Trimethylsilyl Triflate and Perchlorate as Catalysts
Vorbrueggen, Helmut,Krolikiewicz, Konrad,Bennua, Baerbel
, p. 1234 - 1255 (2007/10/02)
The novel Lewis acids (CH3)3SiOSO2CF3 (5), (CH3)3SiOSO2C4F9 (6), and (CH3)3SiClO4 (4) are highly selective and efficient Friedel-Crafts catalysts for nucleoside formation from silylated heterocycles and peracylated sugars as well as for rearrangements of persilylated protected nucleosides.With basic silylated heterocycles these new catalysts give much higher yields of the natural N-1-nucleosides than with SnCl4.
