Nickel-Catalyzed Directed Cross-Electrophile Coupling of Phenolic Esters with Alkyl Bromides
作者:Feiyan Yang、Decai Ding、Chuan Wang
DOI:10.1021/acs.orglett.0c03342
日期:2020.12.4
electrophilic acyl source in the reaction with diverse primary and secondary unactivated alkyl bromides. The cleavage of the relatively inert C–O bond is facilitated by the neighboring coordinating hydroxyl or sulfonamide moiety. By circumventing the use of pregenerated organometallics, this method allows efficient preparation of a variety of o-hydroxyl and tosyl-protected o-amino aryl ketones with high compatibility
Nickel-catalyzed C–O/O–H Annulation of Salicylate Esters with Alkynes: Activation of C–O Bond in Esters
作者:Yasuaki Iyori、Naoto Chatani
DOI:10.1246/cl.200885
日期:2021.3.5
The Ni-catalyzed C−O/O−H annulation of salicylate esters with alkynes, leading to the production of chromone derivatives is reported. The key step in the reaction is the cleavage of an acyl C-Obond. The presence of a base is essential for the reaction to proceed.
Nickel-Catalyzed Directed Cross-Electrophile Coupling of Phenolic Esters with Arylmethyl Trimethylammonium Triflates
作者:Feiyan Yang、Chuan Wang
DOI:10.1021/acs.joc.3c00425
日期:2023.7.21
In this context, we successfully utilize polycyclic aryl-activated alkyl ammonium triflates as the electrophilic aryl-activated alkylating agent in the nickel-catalyzed hydroxyl- or sulfonamide-directed cross-electrophilecoupling reaction with an array of phenyl benzoates, allowing for the synthesis of various aryl ketones under mild conditions.
Integrating Metal-Catalyzed C–H and C–O Functionalization To Achieve Sterically Controlled Regioselectivity in Arene Acylation
作者:Nicholas A. Serratore、Constance B. Anderson、Grant B. Frost、Truong-Giang Hoang、Steven J. Underwood、Philipp M. Gemmel、Melissa A. Hardy、Christopher J. Douglas
DOI:10.1021/jacs.8b06476
日期:2018.8.8
organometallic chemists is the direct functionalization of the bonds most recurrent in organic molecules: C-H, C-C, C-O, and C-N. An even grander challenge is C-C bond formation when both precursors are of this category. Parallel to this is the synthetic goal of achieving reaction selectivity that contrasts with conventional methods. Electrophilic aromatic substitution (EAS) via Friedel-Crafts acylation
有机金属化学家的一个主要目标是将有机分子中最常见的键直接官能化:CH、CC、CO 和 CN。当两种前体都属于此类时,更大的挑战是 CC 键的形成。与此并行的是实现与传统方法形成对比的反应选择性的合成目标。通过 Friedel-Crafts 酰化的亲电芳香取代 (EAS) 是合成芳基酮的最著名方法,芳基酮是许多药物、农用化学品、香料、染料和其他商品化学品的常见结构基序。然而,只有当所需的酰化位点与反应的电子控制区域选择性一致时,EAS 合成策略才有效。在此,我们报告了空间控制的区域选择性芳烃酰化与水杨酸酯通过铱催化获得明显取代的二苯甲酮。实验和计算数据表明,一种独特的反应机制将 CO 活化和 CH 活化与单一铱催化剂相结合,无需外源氧化剂或碱。我们公开了对芳烃和酯成分的合成范围的广泛探索,最终以简明的合成强效抗癌剂羟基苯司他汀。
Pd(ii)-catalyzed oxidative alkoxycarbonylation of 2-phenoxypyridine derivatives with CO and alcohols
作者:Bin Liu、Huai-Zhi Jiang、Bing-Feng Shi
DOI:10.1039/c4ob00084f
日期:——
A Pd(II)-catalyzed oxidative alkoxycarbonylation of phenol derivatives with atmospheric pressure of CO–O2 and alcohols has been achieved. The reaction provides an efficient strategy for the synthesis of carboxylic esters and can be applied to the late-stage modification of complex molecules.