微波辅助三组分偶联-S N Ar(CASNAR)序列使4 H -thiopyran -4-ones退火†
摘要:
微波辅助偶合-S N Ar(CASNAR)序列从容易获得的(杂)芳酰氯开始,以高收率容易地合成了全系列的4 H-硫代吡喃-4-酮作为核心结构单元。炔烃和九水合硫化钠在连续的一锅三组分反应中。所有代表在质子化时均显示出吸收带的明显的光致变色性。根据DFT计算,退火的4 H-硫吡喃-4-酮的电子基态具有相当大的两性离子特征。
A flexible and efficient carbonylative synthesis of thiochromenones from the commercially available materials by utilizing tert-butyl isocyanide as carbonyl source has been developed. This methodology efficiently constructs thiochromenones in moderate to excellent yields with the advantages of wide range of substrates and being applicable to library synthesis.
A Novel Consecutive Three-Component
Coupling-Addition-S<sub>N</sub>Ar (CASNAR) Synthesis
of 4<i>H</i>-Thiochromen-4-ones
作者:Thomas Müller、Benjamin Willy
DOI:10.1055/s-0029-1216735
日期:——
4H-Thiochromen-4-ones and 4H-thiopyrano[2,3-b]pyridin-4-ones are readily synthesized in good yields by a consecutive one-pot, three-component coupling-addition-S N Ar (CASNAR) sequence starting from aroyl chlorides, alkynes, and sodium sulfide nonahydrate.
以酰氯、炔烃和硫化钠为起点,通过连续的一锅三组份偶联-加成-S N Ar (CASNAR) 顺序,4H-硫代色原-4-酮和 4H-硫代吡喃并[2,3-b]吡啶-4-酮很容易合成,而且产率很高。