Metal-Free Oxidation of Primary Amines to Nitriles through Coupled Catalytic Cycles
作者:Kyle M. Lambert、James M. Bobbitt、Sherif A. Eldirany、Liam E. Kissane、Rose K. Sheridan、Zachary D. Stempel、Francis H. Sternberg、William F. Bailey
DOI:10.1002/chem.201600549
日期:2016.4.4
selective, room temperature oxidation of primaryamines to the corresponding nitriles in 85–98 % isolated yield. This metal‐free, scalable, operationally simple method employs a catalytic quantity of 4‐acetamido‐TEMPO (ACT; TEMPO=2,2,6,6‐tetramethylpiperidine N‐oxide) radical and the inexpensive, environmentally benign triple salt oxone as the terminal oxidantunder mild conditions. Simple filtration of
多个相互交织的催化循环之间的协同作用使室温下伯胺选择性氧化为相应的腈,分离出的产率为85%至98%。这种无金属,可扩展,操作简单的方法采用催化量的4-乙酰氨基-TEMPO(ACT; TEMPO = 2,2,6,6-四甲基哌啶N-氧化物)自由基和廉价,对环境无害的三盐氧酮作为在温和条件下的末端氧化剂。通过硅胶简单过滤反应混合物,得到纯腈产物。
A Palladium-Catalyzed Three-Component Cross-Coupling of Conjugated Dienes or Terminal Alkenes with Vinyl Triflates and Boronic Acids
作者:Longyan Liao、Ranjan Jana、Kaveri Balan Urkalan、Matthew S. Sigman
DOI:10.1021/ja201358b
日期:2011.4.20
A three-component coupling of vinyl triflates and boronic acids to alkenes catalyzed by palladium is reported. Using 1,3-dienes, selective 1,2-alkene difunction-alization is observed, whereas the use of terminal alkenes results in 1,1-alkene difunctionalization. The reaction outcome is attributed to the formation of stabilized, cationic Pd-π-allyl intermediates to regulate β-hydride elimination.
A medicament for enhancing an effect of a cancer therapy based on a mode of action of DNA injury, which comprises as an active ingredient a compound represented by the following general formula (I) or a salt thereof:
wherein one of R
1
and R
2
represents hydrogen atom and the other represents the formula —X-A wherein A represents hydrogen atom or an acyl group, X represents oxgen atom or NH; one of R
3
and R
4
represents hydrogen atom and the other represents the following formula:
wherein Y represents a sulfonyl group or a carbonyl group, R
5
represents a cyclic group, Z represents a single bond or a C
1
to C
4
alkylene group, R
6
represents hydrogen atom or a C
1
to C
6
alkyl group.
A medicament having inhibitory activity against NF-κB activation, which comprises a compound represented by the following general formula (I) or a pharmacologically acceptable salt as an active ingredient:
wherein X represents a connecting group, A represents hydrogen atom or acetyl group, E represents an aryl group or a heteroaryl group, and ring X represents an arene or a heteroarene.
A medicament having inhibitory activity against NF-κB activation which comprises as an active ingredient a substance selected from the group consisting of a compound represented by the following general formula (I) and a pharmacologically acceptable salt thereof, and a hydrate thereof and a solvate thereof:
wherein A represents hydrogen atom or acetyl group, E represents a 2,5-di-substituted or a 3,5-di-substituted phenyl group, or a monocyclic or a fused polycyclic heteroaryl group which may be substituted, provided that the compound wherein said heteroaryl group is circle around (1)} a fused polycyclic heteroaryl group wherein the ring which binds directly to —CONH— group in the formula (I) is a benzene ring, circle around (2)} unsubstituted thiazol-2-yl group, or circle around (3)} unsubstituted benzothiazol-2-yl group is excluded, ring Z represents an arene which may have one or more substituents in addition to the group represented by formula —O-A wherein A has the same meaning as that defined above and the group represented by formula —CONH-E wherein E has the same meaning as that defined above, or a heteroarene which may have one or more substituents in addition to the group represented by formula —O-A wherein A has the same meaning as that defined above and the group represented by formula —CONH-E wherein E has the same meaning as that defined above.