has been prepared. The synthesis is diastereoselective for the production of the C12 quaternary center, which is obtained via a conjugate addition reaction directed by an adjacent chiral, nonracemic ketal. A single crystal X-ray analysis of a derivative of the final product established the absolute stereochemistry at C12.
已制备用于合成海洋
天然产物 N-methylwelwitindolinone C 异
硫氰酸酯的
环己酮中间体。该合成对 C12 季
铵中心的产生具有非对映选择性,其通过由相邻手性非外消旋
缩酮引导的共轭加成反应获得。最终产品衍
生物的单晶 X 射线分析确定了 C12 处的绝对立体
化学。