A Short Enantiosynthesis ofDioxaspiroacetalic Semiochemicals by Using Chiral Building-Blocksfrom<i>rac</i>-1,n-Alkanediols by Lipase-Mediated Resolution
作者:Isidoro Izquierdo、María T. Plaza、Miguel Rodríguez、Juan A. Tamayo
DOI:10.1055/s-2003-40205
日期:——
(2R,6S,8R)-2,8-Dimethyl-1,7-dioxaspiro[5.5]undecane (la) and its enantiomer 1b, have been synthesized by Wittig's methodology using the ylide from acetone-1,3-bis(triphenylphosphonium) chloride and the appropriately protected aldehydes from chiral 1,3-butanediols. The latter are prepared by a chemoenzymatic resolution procedure.
(2R,6S,8R)-2,8-Dimethyl-1,7-dioxaspiro[5.5] undecane (la) 及其对映异构体 1b 已通过 Wittig 的方法使用来自 acetone-1,3-bis(triphenylphosphonium) 的叶立德合成) 氯化物和适当保护的醛免受手性 1,3-丁二醇的影响。后者是通过化学酶拆分程序制备的。