Asymmetric Synthesis of Jaspine B (Pachastrissamine) via an Organocatalytic Aldol Reaction as Key Step
作者:Dieter Enders、Violeta Terteryan、Jiří Paleček
DOI:10.1055/s-2008-1067142
日期:2008.7
The asymmetric synthesis of jaspine B (pachastrissamine) using a (R)-proline-catalyzed enantioselective aldol reaction as key step is described. Jaspine B was synthesized from the commercially available and inexpensive 1-pentadecanal and the dihydroxyacetone equivalent 2,2-dimethyl-1,3-dioxan-5-one in nine steps, good overall yield (23.6%) and excellent stereoselectivity (de >98%, ee = 95%).
描述了使用 (R)-脯氨酸催化的对映选择性醛醇反应作为关键步骤的 jaspine B (pachastrissamine) 的不对称合成。Jaspine B 由市售且廉价的 1-十五醛和二羟基丙酮等价物 2,2-二甲基-1,3-二恶烷-5-one 分九步合成,具有良好的总收率 (23.6%) 和出色的立体选择性(de > 98 %,ee = 95%)。