Results 21 to 30 of about 538,149 (390)

PdII-Catalyzed Cyclization of 1-Cyclopropyl-2-propynyl Acetates

CHIMIA, 1985
PdCl2(MeCN)2 catalyzes the cyclization of 1-cyclopropyl-2-propynyl acetates to 3-methyl-1,4-cyclopentadienyl acetates, which are cleaved in situ to 2-cyclopentenones.
Valentin Rautenstrauch
doaj   +1 more source

An environmentally benign cascade reaction of 1,2,3-indantriones with ethyl 2-(pyridine-2-yl)acetates for site-selective synthesis of 5H-isochromeno[4,3-b]indolizin-5-ones

Green Synthesis and Catalysis, 2021
A novel approach was developed for the synthesis of 5H-isochromeno [4,3-b]indolizin-5-ones (ICIDOs) 3 through a cascade reaction of 1,2,3-indantriones 1 with ethyl 2-(pyridine-2-yl)acetates 2.
Haodan He, Jiahui Nie, Yinggang Duan, Jun Lin, Shengjiao Yan   +4 more
doaj   +1 more source

Facile Synthesis of Substituted 1,1-Difluoroallenes via Carbonyl Difluorovinylidenation [PDF]

, 2012
Two methods for the difluorovinylidenation of carbonyl compounds have been developed to synthesize 1,1-difluoroallenes bearing various substituents. The reaction of 1-bromo-2,2-difluorovinyllithium, generated from 1,1-dibromo-2,2-difluoroethylene and n ...
Fuchibe Kohei, Ichikawa Junji, Oh Ken, Yokota Misaki, 市川 淳士, 渕辺 耕平   +5 more
core   +1 more source

Regioselectivity Control in the Oxidative Formal [3 + 2] Annulations of Ketoxime Acetates and Tetrohydroisoquinolines.

Organic Letters, 2019
A novel copper-catalyzed oxidative formal [3 + 2] annulations of ketoxime acetates and tetrohydroisoquinolines for the synthesis of fused pyrazoles and imidazoles has been developed.
Z. Qu, Feng Zhang, G. Deng, Huawen Huang
semanticscholar   +1 more source

Effect of ethyl acetate extract of usnea longissima on esophagogastric adenocarcinoma in rats [PDF]

Acta Cirúrgica Brasileira, 2019
Purpose: To investigate the effects of the EtOAc extract of U. longissima which is uninvestigated previously on esophagogastric cancer induced in rats with N-methyl-N-nitro-N-nitrosoguanidin (MNNG). Methods: The anticancer activity of EtOAc extract of
Renad Mammadov, Bahadir Suleyman, Durdu Altuner, Elif Demirci, Nihal Cetin, Adnan Yilmaz, Huseyin Baykal, Hilal Alpcan, Emine Akyuz Turumtay, Halis Suleyman   +9 more
doaj   +2 more sources

Apples as enantiospecific bioreagents in the hydrolysis of racemic esters and oxygenation of alcohols obtained during the process

Acta Societatis Botanicorum Poloniae, 2014
Biotransformation carried out by apples (Malus silvestris) resulted in enantiospecific hydrolysis of racemic acetates, the derivatives of secondary aromatic-aliphatic or terpenic alcohols. The alcohols are oxygenated to ketones (reversible reaction). The
Agnieszka Mironowicz
doaj   +1 more source

Ophiostomatoid fungi synergize attraction of the Eurasian spruce bark beetle, Ips typographus to its aggregation pheromone in field traps

Frontiers in Microbiology, 2022
Eurasian spruce bark beetle, Ips typographus is a destructive pest of the Norway spruce (Picea abies). Recent outbreaks in Europe have been attributed to global warming and other anthropogenic impacts.
Anna Jirošová, Roman Modlinger, Jaromír Hradecký, Rajarajan Ramakrishnan, Kateřina Beránková, Dineshkumar Kandasamy   +5 more
doaj   +1 more source

A method for the rapid qualitative and quantitative analysis of 4,4-dimethyl sterols

Journal of Lipid Research, 1973
A simple and relatively rapid technique has been developed for the separation of several 4,4-dimethyl steryl acetates, some of which contain sterically hindered nuclear double bonds.
G.F. Gibbons, K.A. Mitropoulos, Kalpana Ramananda   +2 more
doaj   +1 more source

Regio- and Enantioselective Iridium-Catalyzed Amination of Racemic Branched Alkyl-Substituted Allylic Acetates with Primary and Secondary Aromatic and Heteroaromatic Amines.

Journal of the American Chemical Society, 2018
The air- and water-stable π-allyliridium C,O-benzoate modified by ( S)-tol-BINAP, ( S)-Ir-II, catalyzes highly regio- and enantioselective Tsuji-Trost-type aminations of racemic branched alkyl-substituted allylic acetates using primary or secondary ...
S. W. Kim, Leyah A. Schwartz, J. Zbieg, C. Stivala, M. Krische   +4 more
semanticscholar   +1 more source

Substrate specific hydrolysis of aromatic and aromatic-aliphatic esters in orchid tissue cultures

Acta Societatis Botanicorum Poloniae, 2014
We found that tissue cultures of higher plants were able, similarly as microorganisms, to transform low-molecular-weight chemical compounds. In tissue cultures of orchids (Cymbidium 'Saint Pierre' and Dendrobium phalaenopsis) acetates of phenols and ...
Agnieszka Mironowicz, Krystyna Kukułczanka, Antoni Siewiński   +2 more
doaj   +1 more source