Short-step syntheses of (2RS,8R,10R)-YM-193221 (1) and tyroscherin (2), which are biologically active compounds isolated from Pseudallescheria sp., were accomplished in six and eight steps from L-tyrosine. The relative stereochemistry of natural YM-193221 was determined to be 8R *,10R *.
以
L-酪氨酸为原料,通过六步和八步完成了(2RS,8R,10R)-YM-193221 (1) 和 tyroscherin (2) 的短步合成,这两种化合物是从 Pseudallescheria sp.中分离出来的具有
生物活性的化合物。天然 YM-193221 的相对立体
化学结构被确定为 8R *、10R *。