102045-32-9

Upstream product

• 67-56-1 methanol 
• 532-20-7 D-lyxose 
• 532-20-7 D-Ribose 
• 50-69-1 D-ribose 
• 10257-32-6 D-ribose 
• 2280-44-6 D-Glucose 
• 582-52-5 1,2:5,6-di-O-isopropylidene-α-D-glucofuranose 
• 37077-81-9 1,2-isopropylidene-α-D-ribofuranose 
• 2847-00-9 1,2:5,6-di-O-isopropylidene-α-D-hexofuran-3-ulose 
• 2595-05-3 Diacetone D-glucose 
• 4495-04-9 1,2-O-isopropylidene-α-D-allofuranose 
• 63846-98-0 1,2-O-(1-Methylethylidene)-α-D-ribo-pentodialdo-1,4-furanose 
• 532-20-7 D-xylofuranose 
• 609-06-3 L-xylose 

Downstream Products

• 77841-39-5 methyl 2,3,5-tri-O-acetyl-D-lyxofuranoside 
• 52783-53-6 methyl 2,3,3'-tri-O-benzoyl-β-D-apiofuranoside 
• 52783-87-6 methyl 2,3,5-tri-O-benzoyl-α-D-ribofuranoside 
• 69350-76-1 methyl 2,3,5-tri-O-benzoyl-αβ-D-ribofuranoside 
• 83376-69-6 methyl 2,3-di-O-methyl-D-riboside 
• 83376-70-9 methyl 2,5-di-O-methyl-D-riboside 
• 83376-68-5 methyl 3,5-di-O-methyl-D-riboside 
• 2296-41-5 methyl 2,3,5-tri-O-methyl-D-ribofuranoside 
• 58763-00-1 ((3aR,4R,6S,6aR)-6-methoxy-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)methanol 
• 4099-85-8 ((3aR,4R,6R,6aR)-6-methoxy-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)methanol 
• 303041-42-1 methyl 2,3,5-tri-O-[3-(trifluoromethyl)benzoyl]-D-ribofuranoside 
• 4099-85-8 methyl 2,3-O-isopropylidene-D-ribofuranoside 
• 532401-38-0 methyl 6-O-trityl-α,β-ribofuranoside 
• 677299-16-0 (2R,3R,4R)-3,4-bis((2,4-dichlorobenzyl)oxy)-2-(((2,4-dichlorobenzyl)oxy)methyl)-5-methoxytetrahydrofuran 

Relevant academic research and scientific papers

Galacto configured N-aminoaziridines: A new type of irreversible inhibitor of β-galactosidases

A new type of galactose mimetics has been synthesized following a straightforward synthetic approach based on cyclohexene olefin aziridination reactions directed by hydroxyl substituents. These enantiomerically pure galacto-configured N-aminoaziridines are potent irreversible inhibitors of Aspergillus oryzae and Escherichia coli β-galactosidases.

Synthesis of 1'%,2',3',4'%,5',5"-(2)H6-β-D-ribonucleosides and 1'%,2',2",3',4'%,5',5"-(2)H7-β-D-2'-deoxyribonucleosides for Selective Suppression of Proton Resonances in Partially-deuterated Oligo-DNA, Oligo-RNA and in 2,5A core ((1)H-NMR window)

Raney nickel-(2)H2O exchange reaction on an epimeric mixture of methyl α/β-D-ribofuranoside 1 produced methyl 1%,2,3,4%,5,5'-(2)H6-α/β-D-ribofuranoside 2 ( >97 atom percent (2)H at C2, C3, C5/5'; ca. 85 atom percent (2)H at C4(C4%); ca. 20 atom percent (2)H at C1(C1%)) which was obtained in 60 - 80percent yield along with epimeric xylo and arabino by-products.Toluoylation of the crude 2 in dry pyridine and a careful separation on a column of silica gel gave pure 1-O-methyl-2,3,5-tri-O-(4-toluoyl)-α/β-D-1%,2,3,4%,5,5'-(2)H6-ribofuranoside 4 (48percent).Conversion of 4 to1-O-acetyl-2,3,5-tri-O-toluoyl-α/β-D-1%,2,3,4%,5,5'-(2)H6-ribofuranoside 6 (82percent) provided the crucial building block for the synthesis of deuterionucleosides for RNA or DNA synthesis.Compound 6 was then condensed with silyated uracil, N4-benzoylcytosine, N6-benzoyladenine, N2-acetyl-O6-diphenylcarbamoylguanine and thymine in anhydrous solvent using trimethylsilyl trifluoromethanesulfonate to give the corresponding isomerically pure 1'%,2',3',4'%,5',5"-(2)H6-ribonucleoside derivatives 7, 8, 9, 10, 11 in 75, 85, 60, 73 and 91percent yields, respectively. 1'%,2',3',4'%,5',5"-(2)H6-ribonucleosides 13-16 were converted in high yields to the corresponding 1'%,2',2",3',4'%,5',5"-(2)H7-2'-deoxynucleosides 41-44 in the following manner: 3',5'-O-(1,1,3,3-tetraisopropyldisiloxane-1,3-diyl (TPDS)-1'%,2',3',4'%,5',5"-(2)H6-nucleosides 29-32 were converted to the corresponding 2'-O-phenoxythiocarbonyl derivatives 33-36, which were deoxygenated by tri-n-butyltin deuteride to give 1'%,2',2",3',4'%,5',5"-(2)H7-2'-deoxynucleosides 37-40 and subsequently deprotected to give 41-44.Pure 1'%,2',3',4'%,5',5"-(2)H6-ribonucleoside derivatives 12-15, 1'%,2',2",3',4'%,5',5"-(2)H7-2'-deoxynucleoside blocks 41-44 and their natural-abundance counterparts were then used to assemble partially deuterated ribonucleotide-dimers (* indicates deuterated moiety): UpA* 77, CpG* 78, ApU* 79, GpC* 80, partially deuterated 2'-deoxyribonucleotide-dimers d(TpA*) 93, d(CpG*) 94, d(ApT*) 95, d(GpC*) 96 and partially deuterated 2,5A core (A*2'p5'A2'p5'A*) (109).These nine partially deuterated oligonucleotides were subsequently compared with their corresponding natural-abundance counterparts by 500 MHz (1)H-NMR spectroscopy to evaluate the actual NMR simplifications achieved in the non-deuterated part ((1)H-NMR window) as a result of specific deuterium incorporation.Detailed 1D (1)H-NMR (500 MHz), 2D correlation spectra (DQF-COSY and TOCSY), T1 measurements for (1)H-, (13)C- and INEPT (13)C-NMR spectra have been presented and discussed to assess the utility of stereospecific deuterium incorporation to create the (1)H- or (13)C-NMR window.

Magnesium pyrophosphates in enzyme mimics of nucleotide synthases and kinases and in their prebiotic chemistry

Derivatives of ribosyl pyrophosphate have been synthesized, and examined with magnesium salts in the coupling of the ribose unit to various nucleophiles, including pyrazole and 2-chloroimidazole. Only with the magnesium salt present did they generate the ribosyl cation by binding to the leaving group and then couple the ribose derivative with nucleophiles. The role of magnesium salts in phosphorylation of methanol by ATP was also examined. Here a remarkable effect was seen: phosphorylation by ATP was slowed with low concentrations of Mg2+ but accelerated by higher concentrations. Related effects were also seen in the effect of Mg2+ on phosphorylation by ADP. The likely mechanisms explain these effects.

Stereoselective Synthesis of Ribofuranoid exo-Glycals by One-Pot Julia Olefination Using Ribofuranosyl Sulfones

One-pot Julia olefination using ribofuranosyl sulfones is described. The α-anomers of the ribofuranosyl sulfones were synthesized with complete α-selectivity via the glycosylation of heteroarylthiols using ribofuranosyl iodides as glycosyl donors and the subsequent oxidation of the resulting heteroaryl 1-thioribofuranosides with magnesium monoperphthalate (MMPP). The Julia olefination of the α-ribofuranosyl sulfones with aldehydes proceeded smoothly in one pot to afford the thermodynamically less stable (E)-exo-glycals with modest-to-excellent stereoselectivity (up to E/Z = 94:6) under the optimized conditions. The E selectivity was especially high for aromatic aldehydes. In contrast, the (Z)-exo-glycal was obtained as the main product with low stereoselectivity when the corresponding β-ribofuranosyl sulfone was used (E/Z = 41:59). The remarkable impact of the anomeric configuration of the ribofuranosyl sulfones on the stereoselectivity of the Julia olefination has been rationalized using density functional theory (DFT) calculations. The protected ribose moiety of the resulting exo-glycals induced completely α-selective cyclopropanation on the exocyclic carbon-carbon double bond via the Simmons-Smith-Furukawa reaction. The 2-cyanoethyl group was found to be useful for the protection of the exo-glycals, as it could be removed without affecting the exocyclic C=C bond.

Isopolar phosphonate analogue of adenosine diphosphate ribose

(Chemical Equation Presented) The synthesis of the bisphosphonate ADP-ribose, in which acetylene has replaced the oxygen of the pyrophosphate linkage, is reported.

Synthesis and biological activity of reversed pyrimidine nucleosides

An efficient approach to reversed nucleosides which enables their synthesis in gram quantities is described. N-1′-Pyrimidine reversed nucleosides were prepared by treating of the sodium salt of pyrimidine bases with protected 5-tosyl ribose. Additionally, N-1′,N-3′-disubstituted reversed nucleosides were isolated in the condensation reactions with the 5-halogen pyrimidines. Using the Sonogashira coupling of 5′-iodouracil reversed nucleoside with ethynyltrimethyl silane gave 5′-ethynyl derivative which was further transformed into 5′-acetyl reversed nucleoside. Biological activity of deprotected reversed nucleosides was validated on the panel of six human carcinoma cell lines (HeLa, MIAPaCa2, Hep2, NCI-H358, CaCo-2, and HT-29). 5′-Iodouracil derivative displayed moderate growth inhibition activity against human colon carcinoma (CaCo-2) cells.

A 2-O-Methylriboside Unknown Outside the RNA World Contains Arsenic

Lipid-soluble arsenic compounds, also called arsenolipids, are ubiquitous marine natural products of currently unknown origin and function. In our search for clues about the possible biological roles of these compounds, we investigated arsenic metabolism in the unicellular green alga Dunaliella tertiolecta, and discovered an arsenolipid fundamentally different from all those previously identified; namely, a phytyl 5-dimethylarsinoyl-2-O-methyl-ribofuranoside. The discovery is of particular interest because 2-O-methylribosides have, until now, only been found in RNA. We briefly discuss the significance of the new lipid in biosynthesis and arsenic biogeochemical cycling.

THE ASSIGNEMENT OF BENZYL METHYLENE CARBON RESONANCES OF PER-O-BENZYLATED METHYL FURANOSIDES; CORRELATION OF ASSIGNED CHEMICAL SHIFTS WITH FURANOSYL-RING STRUCTURE

Benzyl methylene carbon resonances in perbenzylated methyl furanosides have been assigned by using a combination of INADEQUATE and 13C-1H shift-correlation n.m.r. spectroscopies.We find that one-bond carbon-carbon coupling constants between furanosyl-ring carbon atoms and the shifts of benzyl methylene carbon resonances are related to the relative orientation of substituents on the furanosyl rings.Re-examination of shift data for perbenzylated methyl pyranosides suggests that tha same underlying phenomena similarly influence the shilding of pyranosyl-ring carbon atoms and their benzyl methylene carbon substituents.

Design and evaluation of dihydroxytetrahydro-1H-pyrrolo[2,1-c ]-[1,4]benzothiazines as conformationally restricted transition-state inhibitors of β-ribosidases

The preparation of three new chiral thiazines from ribose is described. Two of these are dihydroxytetrahydro-1H-pyrrolo[2,1-c][1,4]benzothiazines with iminopentitol substructures corresponding to the L-lyxo and D-ribo configurations. They were designed to present a favorable transitionstate mimic for the inhibition of ribosidases. This new thiazine class opens the way to the development of new inhibitors to carbohydrate processing enzymes of therapeutic importance such as nucleoside hydrolases and purine nucleoside phosphorylases.

Design, synthesis, and antiviral activity of α-nucleosides: D- and L- isomers of lyxofuranosyl- and (5-deoxylyxofuranosyl)benzimidazoles

Several 2-substituted α-D- and α-L-lyxofuranosyl and 5- deoxylyxofuranosyl derivatives of 5,6-dichloro-2-(isopropylamino)-1-(β-L- ribofuranosyl)benzimidazole (1263W94) and 2,5,6-trichloro1-(β-D- ribofuranosyl)benzimidazole (TCRB) were synthesized and evaluated for activity against two herpesviruses (HSV-1 and HCMV) and for their cytotoxicity against HFF and KB cells. Condensation of 1,2,3,5-tetra-O- acetyl-L-lyxofuranose (2a) with 2,5,6-trichlorobenzimidazole (1) yielded the α-nucleoside 3a. The 2-bromo derivative and 2-methylamino derivative were prepared by treatment of 3a with HBr followed by deprotection or from methylamine, respectively. Compound 3a was deprotected and the resultant nucleoside used to prepare the 2-cyclopropylamino and 2-isopropylamino derivatives. The 2-alkylthio nucleosides were prepared by condensing 2a with 5,6-dichlorobenzimidazole-2-thione followed by deprotection. Alkylation of this adduct gave the 2-methylthio and 2-benzylthio derivatives. Condensation of 5-deoxy-1,2,3-tri-O-acetyl-L-lyxofuranosyl, prepared from L-lyxose, with 1 or 2-bromo-5,6-dichlorobenzimidazole (15), followed by deprotection, gave the 2-chloro or 2-bromo-5'-deoxylyxofuranosyl derivative, respectively. The cyclopropylamino derivative was prepared from the 2-chloro derivative. All D- isomers were prepared in an analogous fashion from D-lyxose. Either compounds were inactive against HSV-1 or weak activity was poorly separated from cytotoxicity. In contrast, the 2-halogen derivatives in both the α-lyxose and 5-deoxy-α-lyxose series were active against the Towne strain of HCMV. The 5-deoxy α-L analogues were the most active, IC50'S = 0.2-0.4 μM, plaque assay; IC90's = 0.2-2 μM, yield reduction assay. All of the 2- isopropylamino or 2-cyclopropylamino derivatives were less active (IC50's = 60-100 μM, plaque assay; IC90's = 17-100 μM, yield reduction assay) and were not cytotoxic. The methylamino, thio, and methylthio derivatives were neither active nor cytotoxic. The benzylthio derivatives were weakly active, but this activity was poorly separated from cytotoxicity. The α-lyxose L- isomers were more active in a plaque assay against the AD169 strain of HCMV compared to the Towne strain, thereby providing additional evidence of antiviral specificity.