Fifteen novel amino acid ionic liquids (AAILs) were prepared by the combination of several tetraalkylammonium cations with four amino acid anions ([Gly], [L-Ala], [β-Ala] and [Val]).The asymmetry of the tetraalkylammonium cations is shown to have a significant influence on the viscosity of the ionic liquids composed of amino acid anions, especially for the four triethylbutylammonium ([N2224])-based ionic liquids that have viscosities of lower than 60 mPa s, with the lowest being only 29 mPa s. The low viscosity tetraalkylammonium-based AAILs are further demonstrated to improve apparently the reaction and mass transfer rates of CO2 in the ionic liquids.
[EN] HALOGENATED HETEROALKENYL- AND HETEROALKYL-FUNCTIONALIZED ORGANIC COMPOUNDS AND METHODS FOR PREPARING SUCH COMPOUNDS<br/>[FR] COMPOSÉS ORGANIQUES HALOGÉNÉS À FONCTION HÉTÉROALCÉNYLE ET HÉTÉROALKYLE ET LEURS PROCÉDÉS DE PRÉPARATION
申请人:ARKEMA INC
公开号:WO2019067394A1
公开(公告)日:2019-04-04
A method for synthesizing halogenated organic compounds, such as halogenated alkenyl group-containing and halogenated alkyl group-containing compounds having a heteroatom (e.g., O,N.S) coupled to a carbon atom of a halogenated alkenyl or halogenated alkyl group, involves reacting a halogenated olefin such as a chloro-substituted trifluoropropenyl compound with an active hydrogen-containing organic compound such as an alcohol (e.g., an aliphatic monoalcohol, aliphatic polyalcohol, or a phenolic compound), a primary amine, a secondary amine or a thiol.
2D and 3D Anilato-Based Heterometallic M(I)M(III) Lattices: The Missing Link
作者:Samia Benmansour、Cristina Vallés-García、Patricia Gómez-Claramunt、Guillermo Mínguez Espallargas、Carlos J. Gómez-García
DOI:10.1021/acs.inorgchem.5b00451
日期:2015.6.1
The similar bis-bidentate coordination mode of oxalato and anilato-based ligands is exploited here to create the first examples of 2D and 3Dheterometallic lattices based on anilato ligands combining M(I) and a M(III) ions, phases already observed with oxalato but unknown with anilato-type ligands. These lattices are prepared with alkaline metal ions and magnetic chiral tris(anilato)metalate molecular
本文利用草酸根和基于茴香酸的配体的类似双双配位模式,基于结合M(I)和M(III)离子的茴香酸配体创建了2D和3D杂金属晶格的第一个实例,这些相已用草酸根观察到。但对芳香型配体未知。这些晶格是用碱金属离子和磁性手性三(芳基)金属酸盐分子构建基块制备的:[M III(C 6 O 4 X 2)3 ] 3- [M III = Fe和Cr; X = Cl和Br;( C 6 O 4 X 2)2–= 2,5-二羟基-1,4-苯醌的3,6-二取代衍生物的二价阴离子,H 4 C 6 O 4)。新化合物包括两个非常相似的2D晶格,分别是(PBu 3 Me)2 [NaCr(C 6 O 4 Br 2)3 ](1)和(PPh 3 Et)2 [KFe(C 6 O 4 Cl 2)3 ](dmf)2(2),都呈现六角形[M I M III(C 6 O 4 X2)3 ] 2 –蜂窝层,在它们之间插入(PBu 3 Me)+
Chemical process for the preparation of purine derivatives
申请人:Beecham Group p.l.c.
公开号:US05138057A1
公开(公告)日:1992-08-11
A process for the preparation of a compound of formula (I) ##STR1## which process comprises reacting a compound of formula (II): ##STR2## wherein the amino group is optionally protected, with a side chain intermediate of formula (III): ##STR3## wherein Q is a leaving group, R.sub.x and R.sub.y are protected hydroxymethyl or acyloxymethyl, or group(s) convertible to hydroxymethyl or acyloxymethyl; and R.sub.z is hydrogen or a group convertible thereto; and thereafter converting the 6- and 8- chloro substituents to hydrogen by means of reduction; converting R.sub.x and R.sub.y when other than hydroxymethyl or acyloxymethyl, to hydroxymethyl or acyloxymethyl, optionally converting R.sub.x /R.sub.y hydroxymethyl to acyloxymethyl or vice versa, deprotecting the 2-amino group where necessary and converting R.sub.z, (when other than hydrogen) to hydrogen; and optionally forming a pharmaceutically acceptable salt thereof.
[EN] PROCESS FOR THE PREPARATION OF 2,2-DIFLUORO-1,3-BENZODIOXOLE AND INTERMEDIATES THEREOF<br/>[FR] PROCÉDÉ DE PRÉPARATION DE 2,2-DIFLUORO-1,3-BENZODIOXOLE ET DE SES INTERMÉDIAIRES
申请人:SRF LTD
公开号:WO2020070759A1
公开(公告)日:2020-04-09
The present invention relates to a process for preparing 2,2-difluoro-1,3-benzodioxole. The process comprises a step of reacting 1,3-benzodioxole with chlorine in benzotrifluoride in the present of a radical initiator. The present invention also relates to the process for preparing 2,2-dichloro-1,3-benzodioxole which is used as an intermediate in preparation of 2,2-difluoro-1,3-benzodioxole.