Practical Catalytic Cleavage of C(sp
<sup>3</sup>
)−C(sp
<sup>3</sup>
) Bonds in Amines
作者:Wu Li、Weiping Liu、David K. Leonard、Jabor Rabeah、Kathrin Junge、Angelika Brückner、Matthias Beller
DOI:10.1002/anie.201903019
日期:2019.7.29
The selective cleavage of thermodynamically stable C(sp3)−C(sp3) single bonds is rare compared to their ubiquitous formation. Herein, we describe a general methodology for such transformations using homogeneous copper‐based catalysts in the presence of air. The utility of this novel methodology is demonstrated for Cα−Cβ bond scission in >70 amines with excellent functional group tolerance. This transformation
Monoalkylation of primary amines using amine hydrobromides and alkyl bromides has been carried out. Under controlled reaction conditions the reactant primary amine was selectively deprotonated and made available for reaction, while the newly generated secondary amine remained protonated, and did not participate in alkylation further. Reaction was carried out under mild reaction conditions and was applicable to a wide range of primary amines and alkyl bromides.
METHOD FOR PRODUCING GLUCOSE BY ENZYMATIC HYDROLYSIS OF CELLULOSE THAT IS OBTAINED FROM MATERIAL CONTAINING LIGNO-CELLULOSE USING AN IONIC LIQUID THAT COMPRISES A POLYATOMIC ANION
申请人:Balensiefer Tim
公开号:US20100081798A1
公开(公告)日:2010-04-01
The present invention relates to a process for preparing glucose from a lignocellulose-comprising starting material, in which this is firstly treated with an ionic liquid and subsequently subjected to an enzymatic hydrolysis. The invention further relates to a process for preparing microbial metabolites, especially ethanol, in which the glucose obtained is additionally subjected to a fermentation.
[DE] DESTILLATION VON IONISCHEN FLÜSSIGKEITEN<br/>[EN] DISTILLATION OF IONIC LIQUIDS<br/>[FR] DISTILLATION DE LIQUIDES IONIQUES
申请人:BASF AG
公开号:WO2005068404A1
公开(公告)日:2005-07-28
Die Erfindung bezieht sich auf ein Verfahren zur Destillation ionischer Flüssigkeiten, bei welchem in einem Schritt en Druck unterhalb des Umgebungsdruckes eingestellt wird und in einem weitren Schritt die ionische Flüssigkeit auf eine Temperatur im Bereich von 60°C bis 350°C erwärmt wird. Das Verfahren dient insbesondere zur Reinigung ionischer Flüssigkeiten.
A process for preparing siloxy carboxylates is characterized by reaction of C
2
-C
10
-monocarboxylic acids with halosiloxanes of the general formula (I),
Hal-(SiR
2
—O)
x
—SiR
3
(I)
in which
Hal is the same or different and is fluorine, chlorine, bromine or iodine,
R is hydrogen, C
1
-C
10
-alkyl or C
6
-C
14
-aryl and
x is an integer from 1 to 20,
to form hydrogen halide in the presence of an auxiliary base, in which the auxiliary base forms, with the hydrogen halide, a salt which forms two immiscible phases with the siloxy carboxylate or the solution of the siloxy carboxylate in a suitable solvent and is removed by a liquid-liquid separation. The process enables simple and economically viable preparation of siloxy carboxylates.