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。
Heterocyclic Analogs of Thioflavones: Synthesis and NMR Spectroscopic Investigations
作者:Ferdinand Fuchs、Gernot Eller、Wolfgang Holzer
DOI:10.3390/molecules14093814
日期:——
The synthesis of several hitherto unknown heterocyclic ring systems derived from thioflavone is described. Coupling of various o-haloheteroarenecarbonyl chlorides with phenylacetylene gives 1-(o-haloheteroaryl)-3-phenylprop-2-yn-1-ones, which were treated with NaSH in refluxing ethanol to yield the corresponding bi- and tricyclic annelated 2-phenylthiopyran-4-ones. Detailed NMR spectroscopic investigations of the ring systems and their precursors are presented.
NETCHITAILO P.; DECROIX B.; MOREL J.; PASTOUR P., J. HETEROCYCL. CHEM., 1978, 15, NO 2, 337-342
作者:NETCHITAILO P.、 DECROIX B.、 MOREL J.、 PASTOUR P.
DOI:——
日期:——
Microwave-assisted three-component coupling-addition-S<sub>N</sub>Ar (CASNAR) sequences to annelated 4H-thiopyran-4-ones
作者:Benjamin Willy、Walter Frank、Thomas J. J. Müller
DOI:10.1039/b917627f
日期:——
A whole family of annelated 4H-thiopyran-4-ones as the core structural unit was readily synthesized in good yields by a microwave-assisted coupling-addition-SNAr (CASNAR) sequence starting from readily available (het)aroyl chlorides, alkynes and sodium sulfide nonahydrate in a consecutive one-pot three-component reaction. All representatives display a pronounced halochromicity of the absorption bands
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。