摘要:
An improved process for the preparation of 2′-modified nucleosides and 2′-deoxy-nucleosides, such as, β-L-2′-deoxy-thymidine (LdT), is provided. In particular, the improved process is directed to the synthesis of a 2′-deoxynucleoside that may utilize different starting materials but that proceeds via a chloro-sugar intermediate or via a 2,2′-anhydro-1-furanosyl-nucleobase intermediate. Where an 2,2′-anhydro-1-furanosyl base intermediate is utilized, a reducing agent, such as Red-Al, and a sequestering agent, such as 15-crown-5 ether, that cause an intramolecular displacement reaction and formation of the desired nucleoside product in good yields are employed. An alternative process of the present invention utilizes a 2,2′-anhydro-1-furanosyl base intermediate without a sequestering agent to afford 2′-deoxynucleosides in good yields. The compounds made according to the present invention may be used as intermediates in the preparation of other nucleoside analogues, or may be used directly as antiviral and/or antineoplastic agents.
摘要:
Provided herein are macrocyclic serine protease inhibitor compounds, for example, of Formula I, pharmaceutical compositions comprising the compounds, and processes of preparation thereof. Also provided are methods of their use for the treatment of an HCV infection in a host in need thereof.
摘要:
An industrially scalable two-step process for preparing a β-L-2′-deoxy-nucleoside that results in a predominance of the β- over the γ-anomeric form of the compound is described. An optional third step may be used to prepare 3′-prodrugs of desirable β-L-2′-deoxy-nucleosides for the delivery of these pharmaceuticals effective for treating viral diseases. The synthetic process is applicable in particular to the formation of β-L-2′-deoxy-cytidine, a pharmaceutically acceptable salt or prodrug thereof. The process can provide a relatively uncontaminated product that may require no further isolation or purification, thereby making the synthesis easily scalable for industrial manufacture.
摘要:
An industrially scalable two-step process for preparing a β-L-2′-deoxy-nucleoside that results in a predominance of the β- over the α-anomeric form of the compound is described. An optional third step may be used to prepare 3′-prodrugs of desirable β-L-2′-deoxy-nucleosides for the delivery of these pharmaceuticals effective for treating viral diseases. The synthetic process is applicable in particular to the formation of β-L-2′-deoxy-cytidine, a pharmaceutically acceptable salt or prodrug thereof. The process can provide a relatively uncontaminated product that may require no further isolation or purification, thereby making the synthesis easily scalable for industrial manufacture.
摘要:
This invention is in the area of phenylindoles that are useful for the treatment of HIV infection, and, in particular, phenylindoles that exhibit significant activity against resistant strains of HIV. The phenylindoles have at least two substituents other than hydrogen on the benzo ring of the indole function, preferably at the 4′ and 5′, 5′ and 6′ or the 5′ and 7′ positions, optionally in combination with disubstitution at positions 3″ and 5″ on the phenyl ring of the compound, and carboxamide containing moieties at position-2 on the indole group of the compound. Methyl is a preferred group for substitution on the phenyl ring. Preferred substituents for the benzo ring of the indole function include but are not limited to chlorine, fluorine, bromine, iodine, CF3, methoxy, CN, and NO2.
摘要:
Oxo-pyrimidine compounds for the treatment of retroviral infections, and particularly for HIV, are described. Also included are compositions comprising the oxo-pyrimidine derivatives alone or in combination with other anti-retroviral agents, processes for their preparation, and methods of manufacturing a medicament incorporating these compounds.
摘要:
A process is provided for the preparation of a key intermediate in the preparation of 2′-branched nucleoside compounds. The process includes contacting a protected precursor 3,4-O-isopropylidene-2-C-substituted-D-arabinono-1,5-lactone with a fluorinating agent under anhydrous conditions and converting the precursor into a protected 2-deoxy-2-halo-2-C-disubstituted ribono-1,5-lactone and optionally into a 2-deoxy-2-halo-2-C-disubstituted ribono-1,4-lactone.
摘要翻译:提供了制备2支支化核苷化合物的关键中间体的方法。 该方法包括在无水条件下将受保护的前体3,4-O-异亚丙基-2-C取代的-MacLCAPS> D SMALLCAPS> - 阿拉蛋酸-1,5-内酯与氟化剂接触并将前体转化为 保护的2-脱氧-2-卤-2- C - 二取代的ribono-1,5-内酯,任选地加入到2-脱氧-2-卤代-2- C-二取代的核糖内-1,4-内酯中。
摘要:
A process is provided for the preparation of a key intermediate in the preparation of 2′-branched nucleoside compounds. The process includes contacting a protected precursor 3,4-O-isopropylidene-2-C-substituted-D-arabinono-1,5-lactone with a fluorinating agent under anhydrous conditions and converting the precursor into a protected 2-deoxy-2-halo-2-C-disubstituted ribono-1,5-lactone and optionally into a 2-deoxy-2-halo-2-C-disubstituted ribono-1,4-lactone.