Synthesis of <i>N</i>-alkylated 2-pyridones through Pummerer type reactions of activated sulfoxides and 2-fluoropyridine derivatives
作者:Gang Hu、Jiaxi Xu、Pingfan Li
DOI:10.1039/c8ob00860d
日期:——
excellent yields through a one-pot procedure involving either normal or interrupted Pummerer reactions between triflic anhydride activated sulfoxides and 2-fluoropyridine derivatives, followed by hydrolysis. This is a rare case that uses 2-fluoropyridine as a nucleophile in Pummerer type reactions.
Synthesis of <i>N</i>-Alkylpyridin-4-ones and Thiazolo[3,2-<i>a</i>]pyridin-5-ones through Pummerer-Type Reactions
作者:Jingjia Huang、Gang Hu、Shaoyu An、Dongding Chen、Minglei Li、Pingfan Li
DOI:10.1021/acs.joc.9b01672
日期:2019.8.2
involving either normal or interrupted Pummerer reactions between triflic anhydride-activated sulfoxides and 4-fluoropyridine derivatives, followed by hydrolysis. On the other hand, triflic anhydride-activated benzyl 6-fluoro-2-pyridyl sulfoxide could react with alkenes or alkynes to afford thiazolo[3,2-a]pyridin-5-ones, via the pyridinium salt intermediates.
N-烷基化的4-吡啶酮是通过一锅法获得的,该方法涉及三氟甲酸酐活化的亚砜和4-氟吡啶衍生物之间的正常或间断的Pummerer反应,然后进行水解。另一方面,三氟甲磺酸酐活化的苄基6-氟-2-吡啶基亚砜可以通过吡啶鎓盐中间体与烯烃或炔烃反应生成噻唑并[3,2 - a ]吡啶-5-酮。
Novel dioxomolybdenum complexes containing ONO-tridentate Schiff base ligands derived from 4-aminobenzohydrazide: synthesis, spectral characterization, and application as efficient homogeneous catalysts for selective sulfoxidation
作者:Hadi Kargar、Mehdi Fallah-Mehrjardi
DOI:10.1007/s13738-021-02282-0
日期:2021.12
Novel dioxomolybdenum Schiff base complexes, [MoO2(Ln)(CH3OH)], were synthesized by the reaction of MoO2(acac)2 and ONO donor Schiff base ligands (H2Ln) derived by the condensation of 4-aminobenzohydrazide and substituted salicylaldehydes. The synthesized ligands and their complexes were characterized by various spectroscopic techniques like FT-IR, 1H NMR, 13C NMR, and elemental analysis (CHN). The
新型二氧钼席夫碱配合物 [MoO 2 (L n )(CH 3 OH)] 是通过 MoO 2 (acac) 2和 ONO 供体席夫碱配体 (H 2 L n )的反应合成的,该配体由 4 -氨基苯甲酰肼和取代的水杨醛。合成的配体及其配合物通过各种光谱技术如 FT-IR、1 H NMR、13C NMR和元素分析(CHN)。复合物中中心金属原子周围的几何形状被认为是扭曲的八面体。此外,通过在叔丁基氢过氧化物存在下在回流条件下在 1,2-二氯乙烷中氧化芳基和烷基硫化物来研究配合物的催化效率。该方法具有收率高、反应时间短、选择性好等优点,可生成相应的亚砜而不会过度氧化成砜。
10.1007/s12039-024-02261-x
作者:Joshi, Asha、Singh, Sandeep、De, Saroj Ranjan
DOI:10.1007/s12039-024-02261-x
日期:——
conditions without any additive. The proposed method offers a practical solution for the deoxygenation of sulfoxides, which has potential applications in various fields such as pharmaceuticals, materials science, and organic synthesis. Graphical abstract A novel strategy for the chemoselective deoxygenation of diverse sulfoxides without metal and additive has been disclosed using D-camphorsulfonic acid (D-CSA)