First total synthesis of the β-carboline alkaloids trigonostemine A, trigonostemine B and a new synthesis of pityriacitrin and hyrtiosulawesine
作者:Tímea Szabó、Viktor Hazai、Balázs Volk、Gyula Simig、Mátyás Milen
DOI:10.1016/j.tetlet.2019.04.044
日期:2019.5
The total synthesis of four natural products, trigonostemine A, trigonostemine B, pityriacitrin, and hyrtiosulawesine was accomplished. The key intermediates, variously substituted 1-formyl-β-carbolines, were prepared in five steps via a novel synthetic approach using readily available starting materials. These formyl derivatives were then further transformed, providing a general route for the synthesis
完成了四种天然产物,三角果糖胺A,三角果糖胺B,pityriacitrin和hyrtiosulawesine的总合成。通过新颖的合成方法,使用容易获得的起始原料,通过五个步骤制备了关键的中间体,即各种取代的1-甲酰基-β-咔啉。然后将这些甲酰基衍生物进一步转化,为合成四种标题生物碱提供了一条通用途径。本文报道的方法代表了两个三角骨素的第一个全合成,以及新的通往糠酸柠檬苦苷和hyrtiosulawesine的途径。