Facile Preparation of α‐Acyloxyacetaldehyde, a Versatile Intermediate in the Synthesis of Antiviral Nucleosides
摘要:
This report describes a novel and simple method for the preparation of a versatile intermediate, alpha-acyloxyacetaldehyde and its acetals, and its application to the synthesis of 4-acetoxy-2-acyloxymethyl-1,3-oxathiolane, an important intermediate in the synthesis of biologically active nucleosides.
2-Substituted-4-substituted-1,3-dioxolanes and use thereof
申请人:Biochem Pharma Inc.
公开号:US06350753B1
公开(公告)日:2002-02-26
Nucleoside analogues containing a 1,3-dioxolane structure are suitable antiviral agents, particulary for the treatment of the HIV infections in mammals, especially humans. Examples of the nucleoside analogues include:
cis-2-acetoxymethyl-4-(thymin-1′-yl)-1,3,-dioxolane,
cis-2-hydroxymethyl-4-(thymin-1′-yl)-1,3-dioxolane,
cis-2-benzoyloxymethyl-4-(cytosin-1′-yl)-1,3-dioxolane, and
cis-2-hydroxymethyl-4-(cytosin-1′-yl)-1,3-dioxolane.
These compounds can be in the form of their racemates or their separate enantiomers.
Processes for preparing substituted 1,3-oxathiolanes with antiviral
申请人:Biochem Pharma Inc.
公开号:US05466806A1
公开(公告)日:1995-11-14
Disclosed are processes for preparing compounds of the formula (I) and pharmaceutically acceptable salts or esters thereof: ##STR1## wherein R.sub.2 is a purine or pyrimidine base or an analogue or derivative thereof; and Z is S, S.dbd.O or SO.sub.2. The invention also relates to intermediates of use in the preparation of these compounds.
[EN] A STEREOSELECTIVE PROCESS FOR PREPARATION OF 1,3-OXATHIOLANE NUCLEOSIDES<br/>[FR] PROCÉDÉ STÉRÉOSÉLECTIF DE PRÉPARATION DE NUCLÉOSIDES 1,3-OXATHIOLANE
申请人:LUPIN LTD
公开号:WO2013021290A1
公开(公告)日:2013-02-14
The present invention relates to a stereoselective glycosylation for the preparation of 1,3-oxathiolane nucleoside in high yield and high optical purity. The invention specifically relates to a process of the preparation of Lamivudine and Emtricitabine using zirconium (IV) chloride (ZrCl4) as a catalyst in glycosylation.
Preparation of intermediates useful in the synthesis of antiviral nucleosides
申请人:——
公开号:US20030162992A1
公开(公告)日:2003-08-28
The present invention is an efficient process for the manufacture of &agr;-acyloxyacetaldehyde, a key intermediate in the synthesis of 1,3-oxathiolane and 1,3-dioxolane nucleosides.