Direct access to 3-substituted 1,4-oxathiepino[5,6-b]pyridine-5-one through one-pot substitution cyclization reaction of 2-mercapto-3-nicotinic acid with α-bromo ketones
作者:Sukhdeep Singh、Andreas Schober、G. Alexander Gross
DOI:10.1016/j.tetlet.2013.11.030
日期:2014.1
A direct, one-pot synthesis route to [1,4]oxathiepino[5,6-b]pyridin-5-one derivatives was optimized by reacting different α-bromo ketones with 2-mercaptonicotinic acid. The advantages of this method include high efficiency, regioselective, and multistep conversion in a single-pot protocol. These types of pyridine annulated[1,4]oxathiepin-5-one derivatives are described here for the first time and seem
通过使不同的α-溴代酮与2-巯基烟酸反应,优化了直接锅合成[1,4]氧代哌啶[ 5,6- b ]吡啶-5-酮衍生物的路线。该方法的优点包括单罐协议中的高效,区域选择性和多步转换。这些类型的吡啶环氧基化的[1,4]氧杂噻吩-5-酮衍生物在这里是首次描述,并且似乎是筛选目的中令人感兴趣的候选物。提出的协议适用于使用稀有化学物质合成此类衍生物。