Chemo‐ and Regioselective Ring Construction Driven by Visible‐Light Photoredox Catalysis: an Access to Fluoroalkylated Oxazolidines Featuring an All‐Substituted Carbon Stereocenter
作者:Xue‐Qiang Chu、Danhua Ge、Mao‐Lin Wang、Weidong Rao、Teck‐Peng Loh、Zhi‐Liang Shen
DOI:10.1002/adsc.201900585
日期:2019.9.3
ether, fluoroalkyl halide, and chiral amino alcohol in a single reaction vessel, which provides an efficient strategy for expanding the pool of pharmaceutically important heterocycles featuring an all‐substituted carbon stereocenter. This process proceeds efficiently in a chemo‐, regio‐, and stereoselective fashion under mild reaction conditions at room temperature and exhibits broad functional group
通过在有机分子中掺入全取代碳立构中心而赋予的独特优势已得到广泛认可。在这项工作中,我们描述了访问C的三部分环化通过在一个反应容器中将易得的甲硅烷基烯醇醚,氟代烷基卤化物和手性氨基醇进行片段组装而得到‐2氟代烷基化的恶唑烷,这为扩展具有全取代碳立构中心的药学重要杂环库提供了有效策略。在室温下,在温和的反应条件下,该过程以化学,区域和立体选择性方式有效地进行,并表现出广泛的官能团耐受性。该受控异环序列的成功实现取决于通过可见光光氧化还原催化的独特的全氟烷基化,区域和立体选择性自由基环化。此外,还实现了直接使用酮作为底物的单锅法。