A Sequential Acyl Thiol–Ene and Thiolactonization Approach for the Synthesis of δ-Thiolactones
作者:Ruairí O. McCourt、Eoin M. Scanlan
DOI:10.1021/acs.orglett.9b01271
日期:2019.5.3
A novel strategy for the synthesis of δ-thiolactones from inexpensive and readily available γ-unsaturated esters has been developed. This strategy incorporates a radical acyl thiol–ene reaction as the key C–S bond forming step. Cyclization is achieved via a Steglich-type thiolactonization of 5-mercaptopentanoic acids. We report the facile and scalable synthesis of δ-thiolactones in moderate to good
已开发出一种从廉价且容易获得的γ-不饱和酯合成δ-硫代内酯的新策略。该策略将自由基酰基硫醇-烯反应纳入了关键的CS键形成步骤。通过5-巯基戊酸的Steglicch型硫内酯化来实现环化。我们报道了在温和的反应条件下,对中等官能团具有良好的收率的δ-硫代内酯的简便,可扩展合成,对一系列官能团具有耐受性。