[DE] VERFAHREN ZUR HERSTELLUNG VON BETA-L-2'DEOXY-THYMIDIN [EN] METHOD FOR PRODUCING BETA-L-2'DEOXY-THYMIDINE [FR] PROCEDE DE PRODUCTION DE BETA-L-2'-DESOXY-THYMIDINE
[EN] PYRAZOLO [1, 5 -A] PYRIMIDINES AS ANTIVIRAL AGENTS<br/>[FR] PYRAZOLO[1,5-A]PYRIMIDINES EN TANT QU'AGENTS ANTIVIRAUX
申请人:GILEAD SCIENCES INC
公开号:WO2011163518A1
公开(公告)日:2011-12-29
The invention provides compounds of Formula I or Formula II: (I), (II) or a pharmaceutically acceptable salt or ester, thereof, as described herein. The compounds and compositions thereof are useful for treating Pneumovirinae virus infections. The compounds, compositions, and methods provided are particularly useful for the treatment of Human respiratory syncytial virus infections.
array of functional group transformations. The unprecedented spiro B-N heterocycles prepared in this study have potential utility as buildingblocks for the synthesis of pharmaceuticals. Preliminary mechanisticstudies suggest that insertion of the alkylidene carbenes into the B-H bonds of the amine-borane adducts proceeds via a concerted process involving a three-membered-ring transition state.
Catalytic isomerization–hydroformylation of olefins by rhodium salicylaldimine pre-catalysts
作者:Pamela N. Sekoto、Tseliso M. Magengenene、Leah C. Matsinha、Richard Tia、James Darkwa、Banothile C. E. Makhubela
DOI:10.1039/d0nj01970d
日期:——
A series of new Schiff-base rhodium(I) water-soluble complexes (C1–C3), were prepared and characterized. These complexes served as catalyst precursors for the hydroformylation of 1-octene and resulted in excellent substrate conversions (>98%) with 100% chemoselectivities to aldehydes, under mild conditions. Notably, good regioselectivities towards branched aldehydes were observed clearly demonstrating
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.
This invention relates to novel phenyl amide or pyridyl amide derivatives of the formula
wherein A
1
, A
2
, B
1
, B
2
and R
1
to R
11
are as defined in the description and in the claims, as well as pharmaceutically acceptable salts thereof. These compounds are GPBAR1 agonists and can be used as medicaments for the treatment of diseases such as type II diabetes.