Chiral [2H]-Labelled Methylene Groups in Trienoic- and Dienoic Fatty Acids: A Facile Approachvia Asymmetric Epoxidation of [2H] Allyl Alcohols
作者:Christoph Neumann、Wilhelm Boland
DOI:10.1002/hlca.19900730324
日期:1990.5.2
Chiral [2H] -labelled methylene groups flanked by two double bonds within (poly)unsaturated fatty acids are readily available from trans-2,3-epoxy[2,3-2H2] alk-4-yn-l-ols, obtained in their turn by asymmetric epoxidation of the corresponding (E)-[2,3-2H2] alk-2-en-4-yn-l-ols (see Scheme 3). The procedure is exemplified for (8S,3Z,6Z,9Z)-[7,8-2H2] trideca-3,6,9-trienoic acid ((8S)-11) and (8R)-11 (Scheme
在(多)不饱和脂肪酸中两侧带有两个双键的手性[ 2 H]标记的亚甲基很容易从反式-2,3-环氧[2,3- 2 H 2 ] alk-4-yn-1-ols获得通过相应的(E)-[[2,3- 2 H 2 ] alk-2-en-4-yn-1-ols(参见方案3)的不对称环氧化而依次得到。该过程为例进行(8S,3Z,6Z,9Z) - [7,8- 2 ħ 2 ]十三-3,6,9-三烯酸((8小号) - 11)和(8 - [R )- 11(方案4)以及(5 S,3Z,6 Z)-[4,5 -2 H 2 ]癸-3,6-二烯酸((5 S)-13)和(5 R)-13(方案5)。