Suzuki–Miyaura Coupling Reactions of Conjunctive Reagents: 2-Borylated Allylic Sulfones
摘要:
In support of various efforts in our group, we developed methods for the convenient Suzuki-Miyaura coupling of borylated allylic sulfones with various electrophiles in both inter- and the less common intramolecular modes. The procedure facilitates the preparation of a wide variety of sulfones in a straightforward fashion, including six- through eight-membered rings.
Carbopalladation-sulphonylation of allene: A versatile preparation of 2-vinyl or 2-aryl allyl sulphones
作者:Nicolas Vicart、Bernard Cazes、Jacques Gore
DOI:10.1016/0040-4020(96)00461-9
日期:1996.7
The allene carbopalladation process can be realized with various vinylic or aromatic derivatives, in the presence of sodium benzenesulphinate, and allows the preparation of the entitled sulphones.
Ni-Catalyzed Reductive Allylation of α-Chloroboronates to Access Homoallylic Boronates
作者:Yixian Lou、Jian Qiu、Kai Yang、Feng Zhang、Chenglan Wang、Qiuling Song
DOI:10.1021/acs.orglett.1c01213
日期:2021.6.18
transition-metal-catalyzed allylation reaction is an efficient strategy for the construction of new carbon–carbon bonds alongside allyl or homoallylic functionalization. Herein we describe a Ni-catalyzed reductive allylation of α-chloroboronates to efficiently render the corresponding homoallylic boronates, which could be readily converted into valuable homoallylic alcohols or amines or 1,4-diboronates
过渡金属催化的烯丙基化反应是在烯丙基或均烯丙基官能化的同时构建新碳-碳键的有效策略。在本文中,我们描述了 α-氯硼酸酯的 Ni 催化还原烯丙基化,以有效地生成相应的高烯丙基硼酸酯,其可以很容易地转化为有价值的高烯丙基醇或胺或 1,4-二硼酸酯。该反应具有广泛的底物范围和良好的官能团兼容性,是对现有制备高烯丙基硼酸酯方法的补充。
Generation of Alkoxyl Radicals by Photoredox Catalysis Enables Selective C(sp<sup>3</sup>
)−H Functionalization under Mild Reaction Conditions
Reported herein is the first visible‐light‐induced formation of alkoxyl radicalsfrom N‐alkoxyphthalimides, and the Hantzsch ester as the reductant is crucial for the reaction. The selective hydrogen atom abstraction by the alkoxyl radical enables C(sp3)−H allylation and alkenylation reactions under mild reaction conditions at room temperature. Broad substrate variations, including a structurally complexed
Catalyst‐Free Deaminative Functionalizations of Primary Amines by Photoinduced Single‐Electron Transfer
作者:Jingjing Wu、Phillip S. Grant、Xiabing Li、Adam Noble、Varinder K. Aggarwal
DOI:10.1002/anie.201814452
日期:2019.4.16
The use of pyridinium‐activated primary amines as photoactive functional groups for deaminative generation of alkyl radicals under catalyst‐free conditions is described. By taking advantage of the visible light absorptivity of electron donor–acceptor complexes between Katritzky pyridiniumsalts and either Hantzsch ester or Et3N, photoinduced single‐electron transfer could be initiated in the absence