Diastereoselective Addition of Grignard Reagents to 3,4-<i>O</i>-Isopropylidene-1-<i>O</i>-triphenylmethyl-L-<i>glycero</i>-2-tetrulose and 1-<i>O</i>-Benzoyl-3,4-<i>O</i>-isopropylidene-L-<i>glycero</i>-2-tetrulose
作者:Hajime Nagano、Mina Ohno、Yoko Miyamae、Yukie Kuno
DOI:10.1246/bcsj.65.2814
日期:1992.10
Diastereoselectivity in the addition of Grignard reagents (RMgX) to 3,4-O-isopropylidene-1-O-triphenylmethyl-L-glycero-2-tetrulose (1) and 1-O-benzoyl-3,4-O-isopropylidene-L-glycero-2-tetrulose (2) depended remarkably on R, X, the solvent, and the reaction temperature. In the reaction of 1 in diethyl ether at 0 °C and 2 in tetrahydrofuran were obtained (2R,3S)-adducts with moderate to high diastereoselectivity
将格氏试剂 (RMgX) 添加到 3,4-O-isopropylidene-1-O-triphenylmethyl-L-glycero-2-tetrulose (1) 和 1-O-benzoyl-3,4-O-isopropylidene- 时的非对映选择性L-glycero-2-tetrulose (2) 显着依赖于 R、X、溶剂和反应温度。在 0 °C 的乙醚中 1 和四氢呋喃中的 2 反应中获得了具有中到高非对映选择性的 (2R,3S)-加合物,而在 -78 °C 的乙醚中反应 2 (2S,3S) -加合物是主要产品。(2R)-2-羟甲基-2-壬基环氧乙烷和(2S)-2-羟甲基-2-十四烷基环氧乙烷被合成。