Photoinduced, Copper-Catalyzed Alkylation of Amides with Unactivated Secondary Alkyl Halides at Room Temperature
作者:Hien-Quang Do、Shoshana Bachman、Alex C. Bissember、Jonas C. Peters、Gregory C. Fu
DOI:10.1021/ja4126609
日期:2014.2.5
The development of a mild and general method for the alkylation of amides with relatively unreactive alkyl halides (i.e., poor substrates for SN2 reactions) is an ongoing challenge in organic synthesis. We describe herein a versatile transition-metal-catalyzed approach: in particular, a photoinduced, copper-catalyzed monoalkylation of primary amides. A broad array of alkyl and aryl amides (as well as
开发一种温和而通用的方法,用相对不活泼的卤代烷(即 SN2 反应的不良底物)对酰胺进行烷基化是有机合成中的一个持续挑战。我们在此描述了一种通用的过渡金属催化方法:特别是光诱导、铜催化的伯酰胺单烷基化。一系列广泛的烷基和芳基酰胺(以及内酰胺和 2-恶唑烷酮)与未活化的仲(和受阻伯)烷基溴和碘结合使用一组相对简单和温和的条件:廉价的 CuI 作为催化剂,无需单独添加配体,并在室温下形成 CN 键。该方法与多种官能团兼容,例如烯烃、氨基甲酸酯、噻吩和吡啶,并已应用于阿片受体拮抗剂的合成。一系列机械观察,包括反应性和立体化学研究,与耦合途径一致,包括铜-酰胺络合物的光激发,然后是电子转移以形成烷基。
Copper(II)-Photocatalyzed N–H Alkylation with Alkanes
作者:Yi-Wen Zheng、Rok Narobe、Karsten Donabauer、Shahboz Yakubov、Burkhard König
DOI:10.1021/acscatal.0c01924
日期:2020.8.7
of N–H bonds with alkanes using a photoinduced copper(II) peroxide catalytic system. Upon light irradiation, the peroxide serves as a hydrogen atom transfer reagent to activate stable C(sp3)–H bonds for the reaction with a broad range of nitrogen nucleophiles. The method enables the chemoselective alkylation of amides and is utilized for the late-stage functionalization of N–H bond containing pharmaceuticals
[EN] NICOTINAMIDE DERIVATIVES USEFUL AS PDE4 INHIBITORS<br/>[FR] DERIVES DE NICOTINAMIDE AGISSANT COMME INHIBITEURS DE PDE4
申请人:PFIZER LTD
公开号:WO2005009966A1
公开(公告)日:2005-02-03
This invention relates to nicotinamide derivatives of formula (I) and to pharmaceutical compositions containing, and the uses of such derivatives as PDE4 inhibitors wherein R7 is attached to the 3- or 4-position of the phenyl ring and is S(O)pR8, R8 is (C1-C4)alkyl optionally substituted by (C3-C6)cycloalkyl; m is 0 or 1; L is a (C3-C8)carbocyclic non-aromatic ring; and the remaining variables are as defined in the claims.
[EN] NICOTINAMIDE DERIVATIVES<br/>[FR] DÉRIVÉS DE NICOTINAMIDE
申请人:PFIZER LTD
公开号:WO2009153720A1
公开(公告)日:2009-12-23
The present invention relates to compounds of the formula (I) and pharmaceutically acceptable salts and solvates thereof, wherein the substituents are defined herein, to compositions containing such compounds and to the uses of such compounds for the treatment of allergic and respiratory conditions.
Nickel-catalyzed reductive amidation of aryl-triazine ethers
作者:Majid M. Heravi、Farhad Panahi、Nasser Iranpoor
DOI:10.1039/c9cc08727c
日期:——
The reaction of activated phenoliccompounds, 2,4,6-triaryloxy-1,3,5-triazine (aryl-triazine ethers), with various isocyanates or carbodiimides in the presence of a nickel pre-catalyst resulted in the synthesis of aryl amides in good to excellent yields.