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。
Nickel-Catalyzed One-Pot Carbonylative Synthesis of 2-Mono- and 2,3-Disubstituted Thiochromenones from 2-Bromobenzenesulfonyl Chlorides and Alkynes
作者:Wei Wang、Zhi-Peng Bao、Xinxin Qi、Xiao-Feng Wu
DOI:10.1021/acs.orglett.1c02442
日期:2021.8.20
A nickel-catalyzed one-pot carbonylation reaction of 2-bromobenzenesulfonyl chlorides with alkynes for the synthesis of thiochromenones has been established. Both terminal and internal alkynes were suitable substrates in this carbonylative transformation, and a broad range of 2-mono- and 2,3-disubstituted thiochromenone products were obtained in moderate to good yields with quite high functional group
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.
Unified Approach to (Thio)chromenones via One-Pot Friedel–Crafts Acylation/Cyclization: Distinctive Mechanistic Pathways of β-Chlorovinyl Ketones
作者:Hun Young Kim、Eunsun Song、Kyungsoo Oh
DOI:10.1021/acs.orglett.6b03348
日期:2017.1.20
method to chromenones and thiochromenones has been developed using a one-pot Friedel–Craftsacylation of alkynes with suitably substituted benzoyl chlorides. This unified approach to (thio)chromenones is readily applicable to aryl- and alkylalkynes where the stereochemically well-defined β-chlorovinyl ketone intermediates undergo distinctively different cyclization pathways. The ready availability
Transition-Metal-Free One-Pot Tandem Synthesis of 4-Quinolone and 4H-Thiochromen-4-one Derivatives Through Sequential Nucleophilic Addition–Elimination–SNAr Reaction
transformed to 4-quinolone or 4H-thiochromen-4-one products through intramolecular SNAr reaction, respectively. 4-Quinolone and 4H-thiochromen-4-one derivatives are readily synthesized in a tandemone-pot manner in good to excellent yields. Starting from (Z)-β-chlorovinyl ketones, an intermolecular nucleophilic addition of amines or sodium hydrogen sulfide to (Z)-β-chlorovinyl ketones was followed by elimination
摘要 4-喹诺酮和4 H-硫代色素-4-酮衍生物很容易以串联-一锅方式以良好至极好的产率合成。从(Z)-β-氯乙烯酮开始,分子间亲核加成胺或硫化氢钠到(Z)-β-氯乙烯酮中,然后消除氯阴离子,得到Z-烯胺或硫代烯醇中间体,可以将其转化通过分子内的S N Ar反应分别生成4-喹诺酮或4 H-硫代色素-4-酮。 4-喹诺酮和4 H-硫代色素-4-酮衍生物很容易以串联-一锅方式以良好至极好的产率合成。从(Z)-β-氯乙烯酮开始,分子间亲核加成胺或硫化氢钠到(Z)-β-氯乙烯酮中,然后消除氯阴离子,得到Z-烯胺或硫代烯醇中间体,可以将其转化通过分子内的S N Ar反应分别生成4-喹诺酮或4 H-硫代色素-4-酮。
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。