作者:Radomir Julina、Thomas Herzig、Bruno Bernet、Andrea Vasella
DOI:10.1002/hlca.19860690216
日期:1986.3.19
The enynol 2 was transformed into D-erythro-sphingosine 11 (7 steps, 46%) and into ceramide 1 (8 steps, 41% overall yield). The key steps were the mono-epoxidation of the enynol 5 (Ti(t-BuO)4, (−)-D-diethyl tartrate, t-BuOOH) to 6 (86%, ≥ 98% ee), the regioselective intramolecular opening of the oxirane 6via the benzylurethane 7, and the reductive tranformation of the acetylene 9 into the oxazolidinone
烯醇2被转化为双-赤-鞘氨醇11(7步,46%)和神经酰胺1(8步,总产率41%)。关键步骤是烯醇5(Ti(t -BuO)4,(-)-D-酒石酸二乙酯,t -BuOOH)的单环氧化为6(86%,≥98%ee)的区域选择性分子内开放的环氧乙烷6经由所述benzylurethane 7,和乙炔的还原穿越- 9到恶唑烷酮10(栗,EtNH 2,88%)。