Facile synthesis of 3-(ω-acetoxyalkyl)thiophenes and derived copolythiophenes using Rieke zinc
摘要:
An optimized synthetic protocol toward highly reactive Rieke zinc is applied for the preparation of a series of omega-(2,5-dibromothiophene-3-yl)alkyl acetate monomers and statistical copolythiophenes derived thereof, with 10% of ester-functionalized side chains. The obtained conjugated polymers are attractive electron donor materials for organic solar cells, notably to increase the thermodynamic stability of the bulk heterojunction polymer:fullerene active layer blend, and are fully characterized by a combination of spectroscopic, thermal analysis and electrochemical techniques. (C) 2013 Elsevier Ltd. All rights reserved.
An Efficient One-Pot Synthesis of Unsymmetrical Ethers: A Directly Reductive Deoxygenation of Esters Using an InBr3/Et3SiH Catalytic System
摘要:
This study describes a novel one-pot procedure for a directly reductive conversion of the carbonyl function of esters to the corresponding ethers by Et3SiH in the presence of a catalytic amount of InBr3.
An indium(III) bromide-triethylsilane reagent system promotes direct reduction of esters to produce the corresponding unsymmetrical ethers. This simple catalytic system accommodated other carbonyl compounds, such as a tertiary amide and a carboxylic acid.
Pheromone, XXXII. Bausteine zur Darstellung zweifach ungesättigter Schmetterlings-pheromone
作者:Hans Jürgen Bestmann、Karl Heinrich Koschatzky、Wilfried Schätzke、Joachim Süß、Otto Vostrowsky
DOI:10.1002/jlac.198119810920
日期:1981.9.21
Die Darstellung α,ω-bifunktioneller Ausgangsverbindungen sowie (Z)- und (E)-konfigurierter, ungesättigter Synthesebausteine, die man mittels Wittig-Reaktion, Michael-Addition, Acetylen-synthese oder Crombie-Reaktion erhält, wird beschrieben. Diese Verbindungen werden im Rahmen eines „Baukastensystems” zur Synthese bisolefinischer Sexualpheromone benötigt.
Photoactuating Artificial Muscles of Motor Amphiphiles as an Extracellular Matrix Mimetic Scaffold for Mesenchymal Stem Cells
作者:Shaoyu Chen、Liangliang Yang、Franco King-Chi Leung、Takashi Kajitani、Marc C. A. Stuart、Takanori Fukushima、Patrick van Rijn、Ben L. Feringa
DOI:10.1021/jacs.1c12318
日期:2022.3.2
motor amphiphiles (MAs), which mimic the structural features of the hydrogel nature of the ECM and additionally show intrinsic dynamic behavior that allow amplifying molecular motions to macroscopic muscle-like actuating functions induced by light. The supramolecularassembly (named artificial muscle) provides an attractive approach for developing responsive ECM mimetic scaffolds for human bone marrow-derived