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Showing 13 to 24 of 9631 entries
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From Biomass-Derived Furans to Aromatics with Ethanol over Zeolite.

Angewandte Chemie (International ed. in English)

Teixeira IF, Lo BT, Kostetskyy P, Stamatakis M, Ye L, Tang CC, Mpourmpakis G, Tsang SC.
PMID: 27490584
Angew Chem Int Ed Engl. 2016 Oct 10;55(42):13061-13066. doi: 10.1002/anie.201604108.

We report a novel catalytic conversion of biomass-derived furans and alcohols to aromatics over zeolite catalysts. Aromatics are formed via Diels-Alder cycloaddition with ethylene, which is produced in situ from ethanol dehydration. The use of liquid ethanol instead of...

Chemical compositions of the volatile extracts from seeds of Dendranthema nankingense and Borago officinalis.

Journal of food and drug analysis

Wu S, Xu T, Huang D.
PMID: 28911380
J Food Drug Anal. 2015 Jun;23(2):253-259. doi: 10.1016/j.jfda.2014.10.006. Epub 2014 Dec 03.

Volatile extracts from the seeds of Dendranthema nankingense Hand.-Mazz. and Borago officinalis L. were prepared using simultaneous distillation and extraction, and analyzed with gas chromatography-mass spectrometry on two capillary gas chromatography columns of different polarity. Ninety-five volatile compounds were...

N-Arylazetidines: Preparation through Anionic Ring Closure.

The Journal of organic chemistry

Quinodoz P, Drouillat B, Wright K, Marrot J, Couty F.
PMID: 26932242
J Org Chem. 2016 Apr 01;81(7):2899-910. doi: 10.1021/acs.joc.6b00169. Epub 2016 Mar 10.

We report herein an efficient synthesis of diversely substituted N-aryl-2-cyanoazetidines based on an anionic ring-closure reaction. These compounds can be prepared from β-amino alcohols in enantiomerically pure form through a three-step sequence involving (i) copper-catalyzed N-arylation, (ii) N-cyanomethylation of...

Highly Enantioselective Construction of Fluoroalkylated Quaternary Stereocenters via Organocatalytic Dehydrated Mannich Reaction of Unprotected Hemiaminals with Ketones.

Organic letters

Zhang S, Li L, Hu Y, Li Y, Yang Y, Zha Z, Wang Z.
PMID: 26414655
Org Lett. 2015 Oct 16;17(20):5036-9. doi: 10.1021/acs.orglett.5b02514. Epub 2015 Sep 28.

A general organocatalytic asymmetric dehydrated Mannich reaction of fluoroalkyl hemiaminals with ketones is reported. In this Mannich reaction, previously less explored aryl ketones showed great reactivity. By virtue of this efficient method, a wide range of biologically active β-amino...

Toward a Comprehensive Understanding of Enhanced Photocatalytic Activity of the Bimetallic PdAu/TiO.

ACS applied materials & interfaces

Czelej K, Cwieka K, Colmenares JC, Kurzydlowski KJ, Xu YJ.
PMID: 28849638
ACS Appl Mater Interfaces. 2017 Sep 20;9(37):31825-31833. doi: 10.1021/acsami.7b08158. Epub 2017 Sep 05.

Photocatalytic selective oxidation of alcohols over titania supported with bimetallic nanoparticles represents an energy efficient and sustainable route for the synthesis of esters. Specifically, the bimetallic PdAu/TiO

2,2,2-Trifluoroethylation of Styrenes with Concomitant Introduction of a Hydroxyl Group from Molecular Oxygen by Photoredox Catalysis Activated by Visible Light.

Organic letters

Li L, Huang M, Liu C, Xiao JC, Chen QY, Guo Y, Zhao ZG.
PMID: 26361093
Org Lett. 2015 Oct 02;17(19):4714-7. doi: 10.1021/acs.orglett.5b02177. Epub 2015 Sep 11.

The visible-light-induced photoredox difunctionalization reactions of styrenes with 1,1,1-trifluoro-2-iodoethane under an oxygen atmosphere in the presence of water give γ-trifluoromethyl alcohols. In this radical reaction, the oxygen atom in the product originates from molecular oxygen, and water is shown...

Connections between the Anomalous Volumetric Properties of Alcohols in Aqueous Solution and the Volume of Hydrophobic Association.

The journal of physical chemistry. B

Ashbaugh HS, Barnett JW, Saltzman A, Langrehr M, Houser H.
PMID: 28968101
J Phys Chem B. 2018 Apr 05;122(13):3242-3250. doi: 10.1021/acs.jpcb.7b08728. Epub 2017 Oct 16.

The partial molar volumes of alcohols in water exhibit a non-monotonic dependence on concentration at room temperature, initially decreasing with increasing concentration before passing through a minimum and rising to the pure liquid plateau. This anomalous behavior is associated...

Synthesis of Quinolines via a Metal-Catalyzed Dehydrogenative N-Heterocyclization.

Chemical record (New York, N.Y.)

Chelucci G, Porcheddu A.
PMID: 27524555
Chem Rec. 2017 Feb;17(2):200-216. doi: 10.1002/tcr.201600083. Epub 2016 Aug 15.

Efficient ruthenium-, rhodium-, palladium-, copper- and iridium-catalysed methodologies have been recently developed for the synthesis of quinolines by the reaction of 2-aminobenzyl alcohols with carbonyl compounds (aldehydes and ketones) or the related alcohols. The reaction is assumed to proceed...

Palladium-Catalyzed Aerobic Oxygenation of Allylarenes.

The Journal of organic chemistry

Li C, Li M, Li J, Liao J, Wu W, Jiang H.
PMID: 28879764
J Org Chem. 2017 Oct 20;82(20):10912-10919. doi: 10.1021/acs.joc.7b01729. Epub 2017 Oct 09.

An efficient and practical protocol for the synthesis of (E)-allylethers from readily available olefins with alcohols or phenols was developed. This aerobic oxidative allylic C-H oxygenation protocol features mild conditions, broad substrate scope, and high atom and step economy,...

Organic Zeolite Analogues Based on Multi-Component Liquid Crystals: Recognition and Transformation of Molecules within Constrained Environments.

Materials (Basel, Switzerland)

Ishida Y.
PMID: 28879985
Materials (Basel). 2011 Jan 11;4(1):183-205. doi: 10.3390/ma4010183.

In liquid crystals (LCs), molecules are confined in peculiar environments, where ordered alignment and certain mobility are realized at the same time. Considering these characteristics, the idea of "controlling molecular events within LC media" seems reasonable. As a suitable...

Ultrastable atomic copper nanosheets for selective electrochemical reduction of carbon dioxide.

Science advances

Dai L, Qin Q, Wang P, Zhao X, Hu C, Liu P, Qin R, Chen M, Ou D, Xu C, Mo S, Wu B, Fu G, Zhang P, Zheng N.
PMID: 28913427
Sci Adv. 2017 Sep 06;3(9):e1701069. doi: 10.1126/sciadv.1701069. eCollection 2017 Sep.

The electrochemical conversion of CO

From 1-Sulfonyl-4-aryl-1,2,3-triazoles to 1-Allenyl-5-aryl-1,2,3-triazoles.

The Journal of organic chemistry

Huang K, Sheng G, Lu P, Wang Y.
PMID: 28474887
J Org Chem. 2017 May 19;82(10):5294-5300. doi: 10.1021/acs.joc.7b00627. Epub 2017 May 10.

An efficient and highly regioselective synthesis of 1-allenyl-5-aryl-1,2,3-triazoles from 1-sulfonyl-4-aryl-1,2,3-triazoles is disclosed. 1-Sulfonyl-4-aryl-1,2,3-triazoles reacted with propargylic alcohols in the presence of trifluoroboron etherate to furnish 1-allenyl-5-aryl-1,2,3-triazoles. When secondary alcohols were used as substrate, the outcome of the reaction was...

Showing 13 to 24 of 9631 entries