Diastereoselective synthesis of trisubstituted tetrahydrofuran (d-lyxo-4) from the equimolar diastereomeric mixture of d-erythro- /d -threo-1-pentenitols (1) is described. The synthesis exploits a sequence of two novel reactions: diastereospecific palladium(II)-catalyzed bicyclization of pentenitols 1 with degeneration of the allylic stereogenic center and subsequent regioselective ring-opening of bicyclic skeleton 2.
本研究描述了从 d-erythro- /d -threo-1-pentenitols (1) 的等摩尔非对映混合物非对映选择性合成三取代
四氢呋喃(d-lyxo-4)的过程。该合成利用了两个新颖反应的序列:非对映特异性
钯(II)催化的
戊烯酚 1 双环化反应(烯丙基立体中心退化)以及随后双环骨架 2 的区域选择性开环反应。