The Methoxyallene Approach to Oxacycles, Part 2: Stereoselective Synthesis of 2,3-Disubstituted Oxepanes
作者:Yagamare Fall、Manuel Pérez、Pilar Canoa、Generosa Gómez、Marta Teijeira
DOI:10.1055/s-2004-834946
日期:——
2,3-Disubstituted oxepanes 3 and 4 were stereoselectively synthesized from methoxyallene (1) and iodide 2. The trans stereochemistry of diol 3 was established by NMR studies of the bicyclic precursor 10, while the cis stereochemistry of 4 was secured by using the highly diastereoselective reducing agent L-Selectride.
2,3-二取代的氧杂环丁烷 3 和 4 由甲氧基丙二烯 (1) 和碘化物 2 立体选择性合成。二醇 3 的反式立体化学是通过双环前体 10 的 NMR 研究确定的,而 4 的顺式立体化学是通过使用高度非对映选择性还原剂 L-Selectride。