Nickel-Catalyzed Borylation of Aryl- and Benzyltrimethylammonium Salts via C–N Bond Cleavage
摘要:
By developing a mild Ni-catalyzed system, a method for direct borylation of sp(2) and sp(3) C-N bonds has been established. The key to this hightly efficient C-N bond borylative cleavage depends on the appropriate choice of the nickel catalyst Ni(COD)(2), ICy center dot HCl as a ligand, and the use of 2-ethoxyethanol as the cosolvent. This transformation shows good functional group compatibility and can serve as powerful synthetic tool for gram-scale synthesis and late-stage C-N borylation of complex compounds.
[EN] N-(HETEROCYCLYL AND HETEROCYCLYLALKYL)-3-BENZYLPYRIDIN-2-AMINE DERIVATIVES AS SSTR4 AGONISTS<br/>[FR] DÉRIVÉS DE N-(HÉTÉROCYCLYL ET HÉTÉROCYCLYLALKYL)-3-BENZYLPYRIDIN-2-AMINE SERVANT D'AGONISTES DE SSTR4
申请人:TAKEDA PHARMACEUTICALS CO
公开号:WO2021202775A1
公开(公告)日:2021-10-07
Disclosed are compounds of Formula (1), and pharmaceutically acceptable salts thereof, wherein n, R1, R4, R5, R6, R7, R8, R9, R10, R11, R14, X2, X3 and X12 are defined in the specification. This disclosure also relates to materials and methods for preparing compounds of Formula (1), to pharmaceutical compositions which contain them, and to their use for treating diseases, disorders, and conditions associated with SSTR4.
Making Dimethylamino a Transformable Directing Group by Nickel-Catalyzed CN Borylation
作者:Hua Zhang、Shinya Hagihara、Kenichiro Itami
DOI:10.1002/chem.201503596
日期:2015.11.16
The dimethylamino (Me2N) group is arguably the most versatile functional group capable of highly efficient and site‐selective directed aromatic functionalizations at the ortho‐, meta‐, and para‐positions depending on reaction conditions. While the repertoire of Me2N‐directed reactions is growing at a rapid pace, the lack of a general method to transform this group to other functionalities hampers its
Synthesis of Benzyl-, Allyl-, and Allenyl-boronates via Copper-Catalyzed Borylation of Alcohols
作者:Lujia Mao、Kálmán J. Szabó、Todd B. Marder
DOI:10.1021/acs.orglett.7b00256
日期:2017.3.3
Alcohols are among the most abundant and readily available organic feedstocks in industrial processes. The direct catalytic functionalization of sp3 C–O bonds of alcohols remains the main challenge in this field. Here, we report a copper-catalyzed synthesis of benzyl-, allyl-, and allenyl-boronates from benzylic, allylic, and propargylic alcohols, respectively. This protocol exhibits a broad reaction
Steric and Chelate Directing Effects in Aromatic Borylation
作者:Jian-Yang Cho、Carl N. Iverson、Milton R. Smith
DOI:10.1021/ja0013069
日期:2000.12.1
Jian-Yang Cho, Carl N. Iverson, and Milton R. Smith, III*Department of Chemistry, Michigan State UniVersityEast Lansing, Michigan 48824ReceiVed April 14, 2000ReVised Manuscript ReceiVed October 18, 2000Hydrocarbon activation has attracted considerable attentionbecause hydrocarbon feedstocks are ubiquitous.
Jan-Yang Cho, Carl N. Iverson, and Milton R. Smith, III*Department of Chemistry, Michigan State University East Lansing, Michigan 48824ReceiVed April 14, 2000Receive Manuscript Received 2000 年 10 月 18 日 碳氢化合物活化已引起相当多的关注,因为碳氢化合物的原料无处不在。
C(sp<sup>3</sup>)–H Selective Benzylic Borylation by In Situ Reduced Ultrasmall Ni Species on CeO<sub>2</sub>
efficient heterogeneous catalyst for the selective borylation of benzylicC(sp3)–H bonds of alkylarenes including secondary derivatives, using pinacolborane as the borylating agent. A thorough physicochemical analysis reveals that in situ reduced ultrasmall Ni species on CeO2 during the reaction are the actual active species responsible for the borylation.