Synthesis of Electron-Deficient Heteroaromatic 1,3-Substituted Cyclobutyls via Zinc Insertion/Negishi Coupling Sequence under Batch and Automated Flow Conditions
摘要:
Synthesis of 1,3-substituted cyclobutyls enabled by zinc insertion into functionalized iodocyclobutyl derivatives followed by Negishi coupling with halo-heteroaromatics is reported. Two distinct sets of conditions were developed; the first involved a two-step batch protocol using activated Rieke zinc, and the second involved a multistep continuous flow process. Both methods showed complementarity and allowed for rapid access to these medicinally relevant motifs, the possibility of scaling up, and automation for library synthesis.
Synthesis of Electron-Deficient Heteroaromatic 1,3-Substituted Cyclobutyls via Zinc Insertion/Negishi Coupling Sequence under Batch and Automated Flow Conditions
摘要:
Synthesis of 1,3-substituted cyclobutyls enabled by zinc insertion into functionalized iodocyclobutyl derivatives followed by Negishi coupling with halo-heteroaromatics is reported. Two distinct sets of conditions were developed; the first involved a two-step batch protocol using activated Rieke zinc, and the second involved a multistep continuous flow process. Both methods showed complementarity and allowed for rapid access to these medicinally relevant motifs, the possibility of scaling up, and automation for library synthesis.
Copper-catalysed amination of alkyl iodides enabled by halogen-atom transfer
作者:Bartosz Górski、Anne-Laure Barthelemy、James J. Douglas、Fabio Juliá、Daniele Leonori
DOI:10.1038/s41929-021-00652-8
日期:——
the fact that nucleophilic displacement (SN2) of alkyl halides with nitrogen nucleophiles is one of the first reactions introduced in organic chemistry teaching, its practical utilization is largely limited to unhindered (primary) or activated (α-carbonyl, benzylic) substrates. Here, we demonstrate an alternative amination strategy where alkyliodides are used as radical precursors instead of electrophiles
尽管卤代烷与氮亲核试剂的亲核置换 (S N 2) 是有机化学教学中最早引入的反应之一,但其实际应用在很大程度上仅限于不受阻碍的(初级)或活化的(α-羰基、苄基)底物. 在这里,我们展示了一种替代胺化策略,其中烷基碘被用作自由基前体而不是亲电子试剂。使用 α-氨基烷基自由基可以通过卤素原子转移将碘化物有效地转化为相应的烷基自由基,而铜催化在室温下组装sp 3 C-N 键。该过程提供 S N2 样的可编程性以及在几种密集功能化药物的后期功能化中的应用证明了其在制备有价值的N-烷基化药物类似物方面的实用性。
[EN] THIENOPYRROLE COMPOUNDS<br/>[FR] COMPOSÉS DE THIÉNOPYRROLE
申请人:GILEAD SCIENCES INC
公开号:WO2022221642A1
公开(公告)日:2022-10-20
The present disclosure relates generally to certain compounds, pharmaceutical compositions comprising said compounds, and methods of making and using said compounds and pharmaceutical compositions. The compounds and compositions provided herein may be used for the treatment or prevention of an autoimmune disease and/or inflammatory condition, including systemic lupus erythematosus and cutaneous lupus erythematosus.
Cu-Catalyzed C(sp<sup>3</sup>) Amination of Unactivated Secondary Alkyl Iodides Promoted by Diaryliodonium Salts
作者:Xin-Yang Lv、Ruben Martin
DOI:10.1021/acs.orglett.3c01216
日期:2023.5.26
Herein, we describe the development of a copper-catalyzed C(sp3) amination of unactivated secondary alkyl iodides mediated by diaryliodonium salts. Our protocol is enabled by the intermediacy of aryl radical species that undergo halogen atom transfer prior to interfacing with copper catalysts, thus setting the basis for a C–N bond formation at sp3-hybridized carbons. The method is characterized by