Studies on the preference of multiple coupling in the introduction of thiophene ring into poly-halogenated aromatic compounds with nickel NHC catalyst
作者:Shota Tanaka、Go Tatsuta、Atsushi Sugie、Atsunori Mori
DOI:10.1016/j.tetlet.2013.01.127
日期:2013.4
Several thiophene derivatives can be deprotonated by the combination of ethyl magnesium chloride (EtMgCl) and a catalytic amount of 2,2,6,6-tetramethylpiperidine (TMP-H). The metalated 3-hexylthiophene reacts with 2,3- and 2,5-dibromothiophenes in the presence of a nickel catalyst bearing NHC ligand (IPr) to afford the di-coupled product exclusively along with recovery of dibromothiophene albeit the
Synthesis of Oligo(thienylene-vinylene) by Regiocontrolled Deprotonative Cross-Coupling
作者:Shota Tanaka、Yuta Fukui、Naoki Nakagawa、Kohei Murakami、Takurou N. Murakami、Nagatoshi Koumura、Atsunori Mori
DOI:10.1021/acs.orglett.5b03567
日期:2016.2.19
Concise synthesis of oligo(thienylene-vinylene) with a head-to-tail type structure is achieved by regioselective deprotonative coupling of 3-hexylthiophene. The palladium catalyzed reaction of 3-hexylthiophene with (E)-2-(2-bromoethenyl)-3-hexylthiophene takes place to afford head-to-tail type trans-1,2-dithienylethene. Further extension of a vinylthiophene unit is similarly performed in an iterative
A Ni<sup>0</sup>(cod)(dq) (COD: 1,5-cycloctadiene; DQ: duroquinone) complex as a catalyst precursor for oligothiophene and polythiophene synthesis
作者:Naoki Noda、Seiha Yamaoka、Ukyo Ogi、Masaki Horie、Kentaro Okano、Atsunori Mori
DOI:10.1039/d4ob00210e
日期:2024.3.27
Ni(cod)(dq) effectively serves as a catalyst precursor for the preparation of well-defined oligothiophenes and polythiophenes.
Concise Synthesis of Well-Defined Linear and Branched Oligothiophenes with Nickel-Catalyzed Regiocontrolled Cross-Coupling of 3-Substituted Thiophenes by Catalytically Generated Magnesium Amide
作者:Shota Tanaka、Daiki Tanaka、Go Tatsuta、Kohei Murakami、Shunsuke Tamba、Atsushi Sugie、Atsunori Mori
DOI:10.1002/chem.201203331
日期:2013.1.28
3‐substituted thiophenes and nickel‐catalyzedcross‐coupling of the thus formed metalated species with a bromothiophene. The reaction of 3‐hexylthiophene with EtMgCl and 2,2,6,6‐tetramethylpiperidine (TMP‐H, 10 mol %) induces the metalation selectively at the 5‐position by use of the catalytically generated hindered magnesium amide (TMPMgCl) and the subsequent reaction of a 2‐halo‐3‐hexylthiophene (bromide