1-4-Alkynediols serve as readily available starting materials for isomerisation to 1,4-diketones, which can be converted in situ into the corresponding furans by acid-catalysed dehydration. A range of 2,5-disubstituted furans was prepared using the ruthenium-based catalyst Ru(PPh3)(3)(CO)H-2 with Xantphos at 1 mol % loading. (C) 2007 Published by Elsevier Ltd.
Au nanoparticlessupported on TiO2 (1 mol %) catalyze the quantitative cycloisomerization of conjugated allenones into furans under very mild conditions. The reaction rate is accelerated by adding acetic acid (1 equiv), but the acid does not participate in the protodeauration step as in the corresponding Au(III)-catalyzed transformation. The process is purely heterogeneous, allowing thus the recycling
[EN] AN APPROACH TO A BOTTOM-UP SYNTHESIS OF NANOCARBONS<br/>[FR] APPROCHE D'UNE SYNTHÈSE ASCENDANTE DE NANOCARBONES
申请人:YISSUM RES DEV CO OF HEBREW UNIV JERUSALEM LTD
公开号:WO2018220634A1
公开(公告)日:2018-12-06
The invention generally provides a method for the synthesis of a π-conjugated system from oligofurans, under conditions involving cycloaddition.
这项发明通常提供了一种从寡呋合物合成π共轭系统的方法,涉及环加成条件。
[EN] METHODS OF MAKING ALPHA, BETA-UNSATURATED CARBOXYLIC ACIDS OR SALTS<br/>[FR] PROCÉDÉS DE FABRICATION D'ACIDES CARBOXYLIQUES ALPHA,BÊTA-INSATURÉS OU DE LEURS SELS
申请人:SABIC GLOBAL TECHNOLOGIES BV
公开号:WO2017158469A1
公开(公告)日:2017-09-21
Methods of making an α,β-unsaturated carboxylic acid or a salt thereof is disclosed. The method can include reacting an alkene and carbon dioxide with a composition comprising a metal containing carboxylation catalyst and a coordinating ligand under conditions suitable to produce the α,β-unsaturated carboxylic acid or salt thereof. The coordinating ligand can include at least two coordinating atoms selected from nitrogen (N), oxygen (O), sulfur (S), and carbene that coordinate with the metal in the carboxylation catalyst.
[EN] ACRYLATES THROUGH OLEFIN/CARBON DIOXIDE COUPLING<br/>[FR] ACRYLATES PAR COUPLAGE OLÉFINE/DIOXYDE DE CARBONE
申请人:SABIC GLOBAL TECHNOLOGIES BV
公开号:WO2019053541A1
公开(公告)日:2019-03-21
Methods of producing α,β-unsaturated carboxylic acid salts are described. A method can include reacting an alkene and carbon dioxide with a composition that includes a carboxylation catalyst and an inorganic base in a protic solvent under reaction conditions suitable to produce an inorganic base salt of an α,β-unsaturated carboxylic acid.
USE OF PHTHALOCYANINE COMPOUNDS WITH ARYL OR HETARYL SUBSTITUENTS IN ORGANIC SOLAR CELLS
申请人:Sundarraj Sudhakar
公开号:US20120068123A1
公开(公告)日:2012-03-22
The present invention relates to organic solar cell comprising at least one photoactive region comprising an organic donor material in contact with an organic acceptor material and forming a donor-acceptor heterojunction, wherein the photoactive region comprises at least one compound of the formulae Ia and/or Ib where M, (R
a
)
m
and (R
b
)
n
as described in the claims and description. Furthermore, the present invention relates to compounds of formulae Ia and Ib, wherein M, (R
a
)
m
and n are as described in the claims and description and R
b
is fluorine and to a process for preparing them.