The stereoselective synthesis of syn-β-amino propargylic ethers by the addition of racemic lithio 3-(methoxymethoxy)allenylcuprates, and more particularly (cyano) and (mesityl)cuprates, to enantiopure chiral N-tert-butylsulfinylimines is reported. The scope and limitations of the reaction is studied. The usefulness of the methodology for the synthesis of compounds having a syn-1,2-amino alcohol unit
Herein, we report a new process for the synthesis of highlyfunctionalizedpyridines based on a tandem Pummerer-type rearrangement, aza-Prins cyclization, and elimination-induced aromatization. This formal [5+1] cyclization provides pyridines in good yields with easily accessible starting materials. The synthetic potential of our new method is further demonstrated in the modification of the frameworks
2-amino alcohols by the addition of 3-chloro- and 3-methoxymethoxy- allenylzincs to chiral tert-butylsulfinylimines is described. The methodology is applicable to the preparation of alkynyl 2-amino-1,3-diols (O,N,O stereotriads) usingα-alkoxy tert-butylsulfinylimines as chiral starting materials. The scope and limitations of the methodology along with recent applications to the efficient asymmetric syntheses
[EN] PLASMIN INHIBITOR, AND PREPARATION METHOD THEREFOR AND APPLICATION THEREOF<br/>[FR] INHIBITEUR DE PLASMINE, SON PROCÉDÉ DE PRÉPARATION ET SON APPLICATION<br/>[ZH] 一种纤溶酶抑制剂、其制备方法及应用