摘要:
Novel anhydroarabinofuranosyldihydrotriazine nucleosides and process for preparing the same. The compounds of formula I are useful as immunosuppressive agents in humans and are also active in vitro against various susceptible Herpes Viruses.
摘要:
Pharmaceutical compositions of antibiotic U-44,590 and derivatives thereof which can be used to treat Gram-negative and Gram-positive bacterial and viral diseases in humans and animals.
摘要:
Process for preparing 2',3',5'-tri-0-acetyl-6-azauridine having the following formula ##SPC1##Which comprises reacting a crude anomeric mixture of methyl D-ribofuranosides having the formula ##SPC2##With anhydrous hydrogen chloride or anhydrous hydrogen bromide in the presence of acetic anhydride and acetic acid to thereby form the corresponding 2,3,5-tri-0-acetyl-D-ribofuranosyl halide having the formula ##SPC3##Wherein X is chloro or bromo, reacting the halide of formula III with 3,5-bis-trimethylsilyloxy-1,2,4-triazine having the following formula ##SPC4##In the presence of an inert solvent and a mercuric halide and recovering the 2',3',5'-tri-0-acetyl-6-azauridine.
摘要:
A METHOD IN WHICH SOLUTIONS OF 2H, 3''-O-ALKYLIDENE-5''O-ACYL-4-THIO-6-AZAURIDINES OR 2'',3''-O-ALKYLIDENE-4-THIO6-AZAURIDINES IN ORGANIC SOLVENTS ARE TREATED WITH AMMONIA AT ATMOSPHERIC PRESSURE TO CONVER THE SUBSTITUTED AZAURIDINES TO 2'',3''-O-ALKYLIDENE-5-O-ACYL-6-AZACYTIDINES OR 2'',3''-O-ALKYLIDENE-6-AZACYTIDINES WHICH MAY THEN BE CONVERTED, IF DESIRED, TO FREE 6-AZACYTIDINE BY DISSOLVING THE ABOVE SUBSTITUTED-6-AZACYTIDINE IN AN ANHYDROUS SOLVENT AND TREATING SAME WITH A METAL ALCOHOLATE AT AN ALKALINE PH.
摘要:
2-THIOPYRIMIDINE NUCLEOSIDES EXHIBITING CYTOTOXIC, ANTIVIRAL, ENZYME-INHIBITING AS WELL AS ANTIHYPERTHYROID EFFECTS ARE OBTAINED BY A NOVEL PROCESS COMPRISING REACTING A SILYL COMPOUND OF THE FORMULA
A1-SI(-A2)(-A3)-S-C WITH A MASKED HALOGEN SUGAR AND THEN SPLITTING OFF THE BLOCKING GROUPS, THE FINAL COMPOUNDS BEING OF THE FORMULA
Z-N WHEREIN X IS O OR NH, Y IS N OR CH, R IS H, ALKYL OF 1-4 CARBON ATOMS, HALOGEN, NITRO, NITRILE LOWER ALKYLAMINO LOWER ALKOXY, OR THE GROUP
-(CH2)N-CO-A
WHEREIN N IS O, 1 OR 2 IS O-ALKYL OF 1-5 CARBON ATOMS NH2 OR LOWER ALKYLAMINO, AND Z IS A SUGAR RESIDUE, AND WHEREIN IN FORMULA I A1, A2 AND A3 REPRESENT LOWER ALKYL.
摘要:
Novel N4-substituted decitabine analogs are disclosed that exhibit promising in vitro and in vivo therapeutic activity. These novel compounds were shown to be resistant to deamination via cytidine deaminase (CDA) metabolism and provide a unique pharmacokinetic profile versus decitabine, while retaining the ability to induce DNA demethylation in target cells. These novel compounds can be used for treating hematological cancers, as well for new therapeutic interventions, including bacterial or viral pneumonia, acute respiratory distress syndrome, pulmonary fibrosis, transplantation and checkpoint inhibitor-induced adverse events, including pneumonitis.
摘要:
The disclosure provides compounds of Formula (I), wherein X, Y, and Z are defined herein. The disclosure also provides particles comprising one or more compounds described herein, compositions comprising one or more compounds or particles described herein and a pharmaceutically acceptable carrier, and methods of treating a subject in need thereof comprising administering one or more compounds, particles, or compositions described herein to the subject. X—Y—Z (I)
摘要:
Orthogonally protected 3′-amino nucleoside monomers and efficient methods for their synthesis are described. The methods employ selective protection of the 3′-amino group in the presence of the unprotected nucleoside base.
摘要:
Provided herein are compounds, compositions and methods for the treatment of Flaviviridae infections, including HCV infections. In certain embodiments, compounds and compositions of nucleoside derivatives are disclosed, which can be administered either alone or in combination with other anti-viral agents. In certain embodiments, the compounds are 2′-chloro nucleosides according to Formula 2001: or a pharmaceutically acceptable salt, solvate, stereoisomeric form, tautomeric form or polymorphic form thereof, wherein B, Z and PD are as described herein.