Organoiodine-Catalyzed Enantioselective Intramolecular Oxyaminations of Alkenes with N-(Fluorosulfonyl)carbamate
作者:Takuya Hashimoto、Chisato Wata
DOI:10.1055/s-0037-1610768
日期:2021.8
Organoiodine-catalyzed enantioselective intramolecular oxyaminations were realized by the use of benzyl N-(fluorosulfonyl)carbamate as the exogenous nitrogen source. The method allows access to enantioenriched lactones and oxazolines, starting from γ,δ- and δ,ε-unsaturated esters and N-allyl amides, respectively.
[EN] COMPOUNDS AND PROCESSES FOR THE PREPARATION OF ERIBULIN<br/>[FR] COMPOSÉS ET PROCÉDÉS POUR LA PRÉPARATION D'ÉRIBULINE
申请人:[en]SIMON FRASER UNIVERSITY
公开号:WO2023144733A1
公开(公告)日:2023-08-03
The present invention relates to compounds and a process for the preparation of eribulin. More specifically, the process to prepare the C14- C35 sulfone fragment of eribulin (i.e. compounds of formula I) by reacting a C14-C26 ketone fragment of eribulin (i.e. compounds of formula II) with a C27-C35 sulfonium salt fragment (i.e. compounds of formula III) under Corey-Chaykovsky reaction conditions is explored. The processes to prepare the intermediate C14-C26 ketone (i.e. compounds of formula II), the intermediate C27-C35 sulfonium salt (i.e. compounds of formula III) and the intermediate C27-C35 aldehyde (i.e. compounds of formula IV) arc also disclosed.