Studies towards the Synthesis of Alkyl<i>N</i>-(4-Nitrophenyl)-3/2-oxomorpholine-2/3-carboxylates
                                
                                    
                                        作者:Uroš Trstenjak、Janez Ilaš、Danijel Kikelj                                    
                                    
                                        DOI:10.1002/hlca.201300085
                                    
                                    
                                        日期:2013.11
                                    
                                    AbstractThe syntheses of methyl 4‐(4‐nitrophenyl)‐3‐oxomorpholine‐2‐carboxylate (3a) and ethyl 4‐(4‐nitrophenyl)‐2‐oxomorpholine‐3‐carboxylate (5b), important building blocks for the synthesis of factor Xa inhibitor rivaroxaban analogs with potential dual antithrombotic activity, via Rh2(OAc)4‐catalyzed OH and NH carbene insertion reactions are described.