Chemoenzymatic synthesis of the enantiomers of desoxymuscarine
摘要:
Two different chemoenzymatic approaches allowed the preparation of the enantiomers of desoxymuscarine 5, a muscarinic receptor agonist. Transesterification of racemic 5-hexen-2-ol 7 with vinyl butyrate under the catalysis of Candida antarctica B lipase was the key step for the preparation of (-)-5 (2R,5R). On the other hand, lipase PS-catalyzed hydrolysis of iodo butyrate (+/-)-14 was utilized to obtain (+)-5 (2S,5S). Both enantiomers were prepared with enantiomeric excesses higher than 98%. (C) 1998 Elsevier Science Ltd. All rights reserved.
[EN] PRODRUGS OF 4'-C-SUBSTITUTED-2-HALO-2'-DEOXYADENOSINE NUCLEOSIDES AND METHODS OF MAKING AND USING THE SAME<br/>[FR] PROMÉDICAMENTS DE NUCLÉOSIDES DE 4'-C-SUBSTITUÉ-2-HALO-2'-DÉSOXYADÉNOSINE ET LEURS PROCÉDÉS DE FABRICATION ET D'UTILISATION
申请人:GILEAD SCIENCES INC
公开号:WO2021188959A1
公开(公告)日:2021-09-23
The present disclosure provides prodrugs of 4'-C-substituted-2- halo-2'-deoxyadenoside nucleosides, and compositions, methods and kits thereof. Such compounds can be useful for treating viral infections including, human immunodeficiency virus. The compounds have the following formula (I).
The invention provides compounds of Formula I:
as described herein, as well as pharmaceutical compositions comprising the compounds, and synthetic methods and intermediates that are useful for preparing the compounds. The compounds of Formula (I) are useful as anti-viral agents and/or as anti-cancer agents.
[EN] SULFONATES OF FURAN-2,5-DIMETHANOL AND (TETRAHYDROFURAN-2,5-DIYL)DIMETHANOL AND DERIVATIVES THEREOF<br/>[FR] SULFONATES DE FURAN-2,5-DIMÉTHANOL ET (TÉTRAHYDROFURAN-2,5-DIYL)DIMÉTHANOL ET LEURS DÉRIVÉS
申请人:ARCHER DANIELS MIDLAND CO
公开号:WO2015094965A1
公开(公告)日:2015-06-25
A process for preparing furanic mono- and/or di-sulfonate molecules from the reduction products of HMF, in particular, from either 2,5-bis-hydroxymethyltetrahydrofurans (THF-diols) or furan-2,5-dimethanol (FDM) under relatively mild conditions is described. The process involves reacting THF-diols or FDM with at least a sulfonate species, and a reagent of either 1) a nucleophilic base or 2) combination of a non-nucleophilic base and a nucleophile, as two separate reagents. The furanic sulfonates synthesized according to the process and some of the associated compounds that can be derivatized from the sulfonates are also provided.
A new oxygen-centered radicalcyclization onto silylenolethers has been developed and utilized for the synthesis of versatile siloxy-substituted tetrahydrofurans. The reactions display excellent chemoselectivity for cyclization onto the electron-rich silylenolether when competing terminal alkene cyclization, 1,5-hydrogen abstraction, and beta-fragmentation pathways are present. The increased chemoselectivity
The invention provides compounds of formula I, II, and III as described herein, as well as pharmaceutical compositions comprising the compounds, and synthetic methods and intermediates that are useful for preparing the compounds. The compounds of formula I, II, and III are useful as anti-viral agents and/or as anti-cancer agents.