本文公开了通过 S E Ar(亲电芳族取代)型反应对N-嘧啶基(杂)芳烃进行区域选择性对-C-H 卤化。S E Ar 型反应已用于二氢吲哚的 C5-溴化(对位选择性)与N-溴代琥珀酰亚胺在无金属和无添加剂的条件下具有良好至极好的收率。所开发的方法也适用于碘化和具有挑战性的氯化。嘧啶基被确定为反应性调节剂,它也控制区域选择性。本方法也适用于苯胺、吡啶、吲哚、羟吲哚、吡唑、四氢喹啉、异喹啉和咔唑的选择性卤化。Fukui 亲核性和自然电荷图等 DFT 研究也支持观察到的p-选择性。标题化合物后官能化为相应的芳基化、烯化和二卤化产物是通过一锅两步的方式实现的。还对药物/天然分子(哈明、依托考昔、可乐定和氯唑沙宗)进行了后期 C-H 溴化,以证明所开发方案的适用性。
Iridium-catalyzed direct C–H amidation of anilines with sulfonyl azides: easy access to 1,2-diaminobenzenes
作者:Lianhui Wang、Zi Yang、Mengqi Yang、Rongyi Zhang、Changsheng Kuai、Xiuling Cui
DOI:10.1039/c7ob01899a
日期:——
An Ir(III)-catalyzed regioselective C–H amidation of anilines with sulfonyl azides is described. The developed protocol has good compatibility with diverse functional groups, efficiently providing the monoamidated products with good to excellent yields under mild reaction conditions. Furthermore, the 2-pyrimidyl and sulfonyl moieties in the amidated products can readily be removed, offering the synthetically
Multiple Roles of the Pyrimidyl Group in the Rhodium‐Catalyzed Regioselective Synthesis and Functionalization of Indole‐3‐carboxylic Acid Esters
作者:Hui Jiang、Shang Gao、Jinyi Xu、Xiaoming Wu、Aijun Lin、Hequan Yao
DOI:10.1002/adsc.201500769
日期:2016.1.21
A regioselective synthesis of indole‐3‐carboxylic acid esters from anilines and diazo compounds has been realized by making use of the pyrimidyl group‐assisted rhodium‐catalyzed CH activation and CNbond formation. The reaction proceeds under mild conditions, exhibits good functional group tolerance and scalability. Reutilization of the pyrimidyl directing group in the resulting products provided
Efficient Ru-catalyzed regioselective C–H oxygenation of N-aryl-2-pyrimidines is described with aryl carboxylic acids in the presence of AgSbF6 as an additive and Ag2CO3 as an oxidant. The reaction can be extended to alkyl, heteroaryl, and α,β-unsaturated carboxylic acids. The regioselectivity, broad substrate scope, and functional group tolerance are the significant practical advantages.
描述了在AgSbF 6作为添加剂和Ag 2 CO 3作为氧化剂的情况下,使用芳基羧酸对N-芳基-2-嘧啶进行Ru催化的区域选择性C–H氧化。该反应可以扩展至烷基,杂芳基和α,β-不饱和羧酸。区域选择性,广泛的底物范围和官能团耐受性是显着的实际优势。
Pyrazolopyrimidines as therapeutic agents
申请人:Abbott Laboratories
公开号:US20020156081A1
公开(公告)日:2002-10-24
The present invention provides compounds of Formula I,
1
including pharmaceutically acceptable salts and/or prodrugs thereof, where G, R
2
, and R
3
are defined as described herein.
本发明提供了公式I的化合物,包括其药学上可接受的盐和/或前药,其中G、R2和R3的定义如本文所述。
Hypervalent Iodine(III) Promoted Direct Synthesis of Imidazo[1,2-<i>a</i>]pyrimidines
An efficient and mild synthesis of imidazo[1,2-a]pyrimidine derivatives has been developed from readily available pyrimidyl arylamines or enamines through a hypervalent iodine-promoted intramolecular C–H bond cycloamination reaction. This protocol allows for the facile construction of biologically active bicyclic imidazo[1,2-a]pyrimidine skeletons as well as other imidazo[1,2-a]-type fused heterocycles