Synthesis of non-symmetrical alkyl carbonates from alcohols and DMC over the nanocrystalline ZSM-5 zeolite
作者:Durgaiah Chevella、Arun Kumar Macharla、Rammurthy Banothu、Krishna Sai Gajula、Vasu Amrutham、Murali Boosa、Narender Nama
DOI:10.1039/c9gc00541b
日期:——
A novel heterogeneous acid (nanocrystalline ZSM-5) catalyzed carboxymethylation of alcohols to non-symmetrical alkyl carbonates using DMC has been realized. Nanocrystalline ZSM-5 (NZSM-5) with a crystal size of 20–30 nm was synthesized by hydrothermal crystallization. The synthesized NZSM-5 was verified by X-ray diffraction, Fourier transformation infrared spectroscopy and solid state NMR. The morphology
已经实现了使用DMC的新型异质酸(纳米晶体ZSM-5)催化醇的羧甲基化为不对称的碳酸烷基酯。通过水热结晶合成了晶体大小为20–30 nm的纳米晶体ZSM-5(NZSM-5)。合成的NZSM-5通过X射线衍射,傅立叶变换红外光谱和固态NMR进行验证。透射电子显微镜和扫描电子显微镜证实了NZSM-5的形态,揭示了由纳米大小(20-30 nm)的NZSM-5颗粒堆积形成的沸石(100-200 nm)聚集体的形成。NZSM-5的理化性质通过氮的吸附和程序升温的氨解吸来测量,这表明表面积为465 m 2 g -1酸度为0.936 mmol g -1。本协议为高产量的各种非对称碳酸烷基酯提供了一种有吸引力的方法。催化剂被有效地循环多达5个连续循环。这种方法拓宽了DMC在绿色化学中可能的利用范围。
A compound of formula (I)
1
wherein R
1
and R
2
represent a hydrogen atom or an aryl, a heterocyclic, an alkyl or an alkenyl, which are optionally substituted, R
3
represents a hydrogen atom or a hydroxyl and X
1
and X
2
represent an oxygen atom, a sulfur atom or a nitrogen containing group, a pharmaceutically acceptable derivative thereof or a salt thereof. A pharmaceutical composition comprising the compound for the prevention or treatment of a bacterial infection. A method for the prevention or treatment of a bacterial infection in a warm-blooded animal comprising administering a pharmacologically effective amount of the compound.
FUNCTIONALIZED FLUOROPOLYMERS AND ELECTROLYTE COMPOSITIONS
申请人:Blue Current, Inc.
公开号:US20160221926A1
公开(公告)日:2016-08-04
Provided herein are functionally substituted fluoropolymers suitable for use in liquid and solid non-flammable electrolyte compositions. The functionally substituted fluoropolymers include perfluoropolyethers (PFPEs) having high ionic conductivity. Also provided are non-flammable electrolyte compositions including functionally substituted PFPEs and alkali-metal ion batteries including the non-flammable electrolyte compositions.
N-Substituted Carbamic Acid Ester Production Method, Isocyanate Production Method Using Such N-Substituted Carbamic Acid Ester, And Composition For Transfer And Storage Of N-Substituted Carbamic Acid Ester Comprising N-Substituted Carbamic Acid Ester and Aromatic Hydroxy Compound
申请人:Shinohata Masaaki
公开号:US20110133121A1
公开(公告)日:2011-06-09
The present invention is a method for producing an N-substituted carbamic acid ester derived from an organic amine from an organic amine, a carbonic acid derivative and a hydroxy composition containing one or more types of hydroxy compounds, wherein the organic amine, the carbonic acid derivative and the hydroxy composition are reacted using a urethane production reaction vessel provided with a condenser, a gas containing the hydroxy composition, the compound having the carbonyl group derived from the carbonic acid derivative, and an ammonia formed as a by-product in the reaction, is introduced into the condenser provided in the urethane production reaction vessel, and the hydroxy composition and the compound having the carbonyl group derived from the carbonic acid derivative are condensed, and wherein a stoichiometric ratio of a hydroxy compound contained in the condensed hydroxy composition to the condensed compound having the carbonyl group derived from the carbonic acid derivative is 1 or more, and a ratio of number of carbonyl groups (—C(═O)—) contained in the compound having the carbonyl group derived from the carbonic acid derivative and number of ammonia molecules contained in the ammonia recovered as a gas from the condenser is 1 or less.