κ‐opioid receptor. A total synthesis has been developed that parlays the stereochemistry of l‐(+)‐tartaric acid into that of (−)‐1 via an unprecedented allylic dithiane intramolecular Diels–Alder reaction to obtain the trans‐decalin scaffold. Tsuji allylation set the C9 quaternary center and a late‐stage stereoselective chiral ligand‐assisted addition of a 3‐titanium furan upon a C12 aldehyde/C17 methyl
Salvinorin A(1)是与人κ阿片受体结合的天然致幻剂。已开发出一种总合成方法,可通过空前的烯丙基二噻烷分子内Diels-Alder反应将l -(+)-
酒石酸的立体
化学与(-)- 1的立体
化学相结合,以获得反-decalin支架。Tsuji烯丙基化作用可确定C9季
铵盐中心,并在C12醛/ C17甲基酯上的后期立体选择性手性
配体辅助添加3-
钛呋喃,从而建立了
呋喃基内酯部分。
酒石酸二醇最终转化为C1,C2酮
乙酸酯。