Systematic Construction of a Monotetrahydrofuran-Ring Library inAnnonaceous Acetogenins by Asymmetric Alkynylation and Stereodivergent Tetrahydrofuran-Ring Formation
作者:Naoto Kojima、Naoyoshi Maezaki、Hiroaki Tominaga、Mikito Asai、Minori Yanai、Tetsuaki Tanaka
DOI:10.1002/chem.200305185
日期:2003.10.17
diastereoisomers of the monotetrahydrofuran-ring cores of annonaceous acetogenins have been synthesized through utilization of asymmetric alkynylation and stereodivergent one-pot tetrahydrofuran-ring formation. In all cases, the asymmetric alkynylation proceeded with very high diastereoselectivity to give eight kinds of optically pure tetrahydrofuran core from a common alpha-oxyaldehyde. We also describe
通过使用不对称的炔基化反应和立体发散的一锅四氢呋喃环的形成,合成了非丙酮乙酸原素的单四氢呋喃环核的所有八个非对映异构体。在所有情况下,不对称炔基化反应都具有很高的非对映选择性,可以从常见的α-氧醛制得八种光学纯的四氢呋喃核。我们还描述了八个异构体的(1)H NMR,(13)C NMR和CD光谱数据的比较,并给出了四氢呋喃环结构的完整细节,包括不对称炔基化的模型研究。