作者:Alberto Avenoza、José I. Barriobero、Jesús H. Busto、Carlos Cativiela、Jesús M. Peregrina
DOI:10.1016/s0957-4166(02)00158-1
日期:2002.4
All four enantiomerically pure 2-hydroxy-7-azabicyclo[2.2.1]heptane-1-carboxylic acids, novel restricted analogues of 3-hydroxyproline, are described. The synthesis starts with the Diels–Alder reaction between methyl 2-benzamidoacrylate and Danishefsky's diene and uses as key steps a base-promoted internal nucleophilic displacement of the methanesulfonate group in the cyclohexane ring, followed by
描述了所有四个对映体纯的2-羟基-7-氮杂双环[2.2.1]庚烷-1-甲酸,它们是3-羟基脯氨酸的新型限制性类似物。合成从2-苯甲酰胺基丙烯酸甲酯和Danishefsky's二烯之间的Diels-Alder反应开始,并将关键步骤用于环己烷环中甲磺酸酯基团的碱促进的内部亲核取代,然后采用拆分方法,该方法涉及非对映异构体的形成和进一步的形成。通过结晶分离。这种合成途径使我们能够获得N -Boc-7-氮杂双环[2.2.1]庚烷-2-酮的对映异构体,用作(-)-和(+)-依巴替丁的前体的有价值的酮以及其他更有趣的类似物。