N- and O-arylation reactions of pyridin-2-ones as ambidentnucleophiles have been achieved with diaryliodonium salts on the basis of base-dependent chemoselectivity. In the presence of N,N-diethylaniline in fluorobenzene, pyridin-2-ones were very selectively converted to N-arylated products in high yields. On the other hand, the O-arylation reactions smoothly proceeded with the use of quinoline in chlorobenzene
5-pyridinone substituted indazoles of the formula
and methods of their use are presented.
本文介绍了公式为5-吡啶酮取代的吲哚唑化合物及其使用方法。
5-pyridinone substituted indazoles
申请人:Albany Molecular Research, Inc.
公开号:US08273770B2
公开(公告)日:2012-09-25
5-pyridinone substituted indazoles of the formula
and methods of their use are presented.
本文介绍了公式为5-吡啶酮取代的吲唑衍生物及其使用方法。
Formal Gold- and Rhodium-Catalyzed Regiodivergent C–H Alkynylation of 2-Pyridones
作者:Yunyun Li、Fang Xie、Xingwei Li
DOI:10.1021/acs.joc.5b02410
日期:2016.1.15
Formal regiodivergent C-H alkynylation of 2-pyridones bearing different N-substituents has been realized under Au(I) and Rh(III) catalysis using a hypervalent iodine alkyne reagent. When catalyzed by Au(I), the alkynylation occurred at the most electron-rich 5-position via an electrophilic alkynylation pathway. The selectivity was switched to the 6-position under assistance of an N-chelation group when a Rh(III) catalyst was employed. A rhodacylic complex has been isolated as a key intermediate.
作者:Shanqing Tao、Jiaxi Xiao、Yadong Li、Fengxia Sun、Yunfei Du
DOI:10.1002/cjoc.202100278
日期:2021.9
The reaction of pyridin-2(1H)-ones with PhICl2 and NH4SCN enables an efficient regioselective thiocyanation, leading to the synthesis of the biologically interesting C5 thiocyanated 2-pyridones in good to high yields. The mechanistic pathway of this metal-free approach is postulated to involve the formation of the reactive thiocyanogen chloride from the reaction of PhICl2 and NH4SCN followed with the
吡啶-2(1 H )-酮与PhICl 2和NH 4 SCN 的反应可实现有效的区域选择性硫氰化,从而以良好或高产率合成具有生物学意义的C5 硫氰化2-吡啶酮。这种无金属方法的机械途径被假定为涉及从 PhICl 2和 NH 4 SCN的反应形成反应性氯化硫氰,然后是吡啶-2(1 H )-一个环的区域选择性亲电硫氰化。