AgNO2 as the NO Source for the Synthesis of Substituted Pyrazole N-Oxides from N-Propargylamines
摘要:
A straightforward method for synthesizing the pyrazole N-oxides from N-propargylamines and AgNO2, through oxidation/cyclization reaction had been developed. AgNO2, was used as the NO source for the first time to synthesize pyrazole N-oxides. Various substituted groups on N-propargylamines proceeded smoothly, and the desired products were obtained in good yields.
AgNO2 as the NO Source for the Synthesis of Substituted Pyrazole N-Oxides from N-Propargylamines
摘要:
A straightforward method for synthesizing the pyrazole N-oxides from N-propargylamines and AgNO2, through oxidation/cyclization reaction had been developed. AgNO2, was used as the NO source for the first time to synthesize pyrazole N-oxides. Various substituted groups on N-propargylamines proceeded smoothly, and the desired products were obtained in good yields.
Electrooxidative tandem cyclization of <i>N</i>-propargylanilines with sulfinic acids for rapid access to 3-arylsulfonylquinoline derivatives
作者:Jie Liu、Min Wang、Laiqiang Li、Lei Wang
DOI:10.1039/d1gc00171j
日期:——
A series of N-propargylanilines (0.2 mmol) and sulfinic acids (0.5 mmol) afforded 3-arylsulfonylquinoline derivatives in high yields (70–93%) and low current efficiencies upon electrooxidation. Electrolyses were carried out in a one-compartment cell, under constant current and ambient conditions, in methanol-nBu4NBF4 containing pyridine (0.4 mmol), without any added chemical oxidant. A scale-up electrolysis
一系列N-炔丙基苯胺(0.2 mmol)和亚磺酸(0.5 mmol)以高收率(70-93%)和低电氧化效率提供了3-芳基磺酰基喹啉衍生物。在恒定电流和环境条件下,在单隔室的电解池中,在不添加任何化学氧化剂的,含有吡啶(0.4 mmol)的甲醇-n Bu 4 NBF 4中进行电解。在5mmol的N-炔丙基苯胺1a上进行放大电解,得到3-芳基磺酰基喹啉3aa,产率为65%,电流效率为56%。提出了机械学假说。
A visible-light-induced oxidative cyclization of <i>N</i>-propargylanilines with sulfinic acids to 3-sulfonated quinoline derivatives without external photocatalysts
作者:Yicheng Zhang、Wei Chen、Xueshun Jia、Lei Wang、Pinhua Li
DOI:10.1039/c8cc10235j
日期:——
A visible-light-induced oxidative cyclization of N-propargyl anilines with sulfinic acids was developed under external photocatalyst-free conditions. The reaction provides a straightforward route to 3-sulfonated quinoline derivatives with good functional group tolerance, excellent yields and high regio-selectivity.
A visible-light-induced cascade cyanoalkylsulfonylation/cyclization/aromatization of N-propargyl aromaticamines with K2S2O5 and cyclobutanone oxime esters for the construction of cyanoalkylsulfonylated quinolines is developed. This cascade transformation features mild reaction conditions, a broad substrate scope, and excellent functional group compatibility, providing a convenient route toward cy
开发了N-炔丙基芳香胺与 K 2 S 2 O 5和环丁酮肟酯的可见光诱导级联氰烷基磺酰化/环化/芳构化,用于构建氰烷基磺酰化喹啉。这种级联转化具有反应条件温和、底物范围广、官能团兼容性好等特点,通过一步形成一个 C-C 键和两个 C-S 键,提供了一条通往氰基烷基磺酰化喹啉的便捷途径。
Copper‐Catalyzed Electrophilic Cyclization of
<i>N</i>
‐Propargylamines with Sodium Sulfinate for the Synthesis of 3‐Sulfonated Quinolines
A convenient and effective protocol for the synthesis of 3-sulfonated quinolines via copper-catalyzed electrophilic cyclization of N-propargylamines has been developed, in which cheap and stable sodiumsulfinates were utilized as green sulfonylation reagents. This cascade transformation involves radical addition, cyclization and dehydrogenative aromatization processes in a one-pot reaction under mild