Simple and Efficient Methods of Synthesis of 3,3-Diarylcyclobutanone and 3,3-Diarylcyclobutylamine Derivatives Using the TiCl4/R3N Reagent System
摘要:
The iminium ions generated in situ by the oxidation of NN-diisopropyl-N-benzylamine using iodine react with diaryl ketones in the presence of TiCl4/R3N to give the corresponding 3,3-diarylcyclobutanones in moderate to good yields (49-86%). The 3,3-diarylcyclobutanone iminium ions formed in this transformation was reduced in situ with B2H6 to produce the corresponding 3,3diarylcyclobutylamines (52-79% yields), a class of compounds with potential antidepressant activity. In addition, a series of NN-dimethyl-3,3-diarylcyclobutylamines were synthesized by the reductive amination of the corresponding 3,3-diarylcyclobutanone derivatives.
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.
Iminium salts are generated in situ, react with TiCl4-trialkylamines, and diaryl ketones to produce 3,3-diaryl-cyclobutanones in moderate to good yields.
亚硝酸盐原位生成,与TiCl4-三烷基胺和二芳基酮反应生成3,3-二芳基-环丁酮,产率中等至良好。
[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.
Method of Separating Acids from Chemical Reaction Mixtures by Means of Apolar Amines
申请人:Huttenloch Oliver
公开号:US20080287709A1
公开(公告)日:2008-11-20
A process for the removal of acids from reaction mixtures, comprising at least one product of value which is sparingly soluble in water, by at least one unpolar amine as an auxiliary base, which includes: a) reacting the auxiliary base with the acid with formation of a salt; b) reacting the salt formed in step a) with a further base which accepts the acid with liberation of the auxiliary base and combines with the acid to be accepted from the auxiliary base to form a salt which is very readily soluble in water; c) extraction of the mixture obtained in step b) with water or an aqueous medium, wherein the salt of the further base dissolves in the aqueous phase and the product of value, or the solution of the product of value, in a suitable solvent and the auxiliary base form at least one separate nonaqueous phase; and d) removal by distillation of at least part of any solvent present from the at least one nonaqueous phase obtained in step c), to form two nonmiscible liquid phases.