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.
Copper-Catalyzed Sulfinyl Cross-Coupling Reaction of Sulfinamides
作者:Mengting Kou、Ziqiang Wei、Zhen Li、Bin Xu
DOI:10.1021/acs.orglett.2c03414
日期:2022.11.25
A copper-catalyzed sulfinyl cross-coupling reaction of sulfinamides with aldehyde-derived N-tosylhydrazones is described. This approach enables facile access for the construction of structurally diverse sulfoxides via novel and efficient S–N/S–Cbond interconversions, features broad substrate scope, and accommodates various functional groups as well as pharmacophores. Moreover, the given sulfinyl cross-coupling
Photocatalytic oxidation of benzylamines and sulfides using selected organoboron complexes as molecular oxygen activators
作者:Tomasz Kliś、Agata Blacha-Grzechnik、Krzysztof Durka、Krzysztof Mazurek、Aleksandra Szymańska、Magdalena Z. Wiloch、Marta Ziółkowska
DOI:10.1016/j.dyepig.2024.112371
日期:2024.12
for the oxidation of 2-furancarboxylic acid, oxidative coupling of benzylamines and oxidation of sulfides. Among the studied compounds, the diarylborinic derivative bearing a 5-chloro-8-oxy-7-iodoquinolinate ligand was selected as the most economic singlet oxygen sensitizer. However, the diphenylborinic complex bearing an 8-oxyquinolinate ligand was the most efficient for the selective oxidation of various
在这项工作中,开发了一种合成方案,以获得一系列带有二芳基硼部分的二芳基硼络合物,该二芳基硼部分与衍生自5-氯-8-羟基-7-碘喹啉、喹啉-2,4-二羧酸的各种二齿N,O-配体螯合或2-(2-羟基-5-甲基苯基)苯并三唑。通过 NMR、IR、CV、UV-vis 和单晶 X 射线衍射分析对所得配合物进行了表征。实验数据得到了理论计算的支持。所获得的配合物作为单线态氧敏化剂用于2-呋喃甲酸的氧化、苄胺的氧化偶联和硫化物的氧化进行测试。在所研究的化合物中,带有5-氯-8-氧基-7-碘喹啉配体的二芳基硼衍生物被选为最经济的单线态氧敏化剂。然而,带有8-羟基喹啉配体的二苯基硼配合物对于将各种苯甲胺选择性氧化为其各自的N-亚苄基苯甲胺来说是最有效的。