Results 81 to 90 of about 83,738 (273)
Thioketone-directed rhodium(I) catalyzed enantioselective C-H bond arylation of ferrocenes
Nature Communications, 2019 The development of straightforward methods for the synthesis of planar chiral ferrocenes remains highly challenging. Here, the authors report a rhodium(I)/phosphonate-catalyzed thioketone-directed enantioselective C-H bond arylation reaction for the ...
Zhong-Jian Cai +4 more
doaj +1 more source
, 2012 We analyze limited enantioselective (LES) autocatalysis in a temperature gradient and with internal flow/recycling of hot and cold material. Microreversibility forbids broken mirror symmetry for LES in the presence of a temperature gradient alone.
Blanco, Celia +5 more
core +1 more source
Asymmetric preparation of antifungal 1-(4 -chlorophenyl)-1-cyclopropyl methanol and 1-(4 -chlorophenyl)-2-phenylethanol. Study of the detoxification mechanism by Botrytis cinerea [PDF]
, 2011 Chiral alcohols are important as bioactive compounds or as precursors to such molecules. On the basis of the different antifungal properties of the enantiopure alcohol derivatives of 4-chlorophenyl cyclopropyl ketone and benzyl 4-chlorophenyl ketone ...
Aleu Casatejada, Josefina +4 more
core +2 more sources
Advanced Synthesis &Catalysis, EarlyView.The catalytic enantioselective epoxidation of acyclic tetrasubstituted alkenes, bearing a trifluoromethyl group, is reported. In the presence of Takemoto's thiourea organocatalyst and tert‐butyl hydroperoxide, epoxides are obtained with excellent yield and good to high enantioselectivity.
Vincenzo Battaglia +4 more
wiley +1 more source
Algicidal lactones from the marine Roseobacter clade bacterium Ruegeria pomeroyi
Beilstein Journal of Organic Chemistry, 2012 Volatiles released by the marine Roseobacter clade bacterium Rugeria pomeroyi were collected by use of a closed-loop stripping headspace apparatus (CLSA) and analysed by GC–MS.
Ramona Riclea +5 more
doaj +1 more source
A Mild and Efficient Iridium‐Catalyzed Method for Aldimine Hydrogenation
Advanced Synthesis &Catalysis, EarlyView.A mild, efficient, and broadly applicable iridium‐catalyzed method for aldimine hydrogenation, facilitating access to an array of corresponding amine products in high isolated yields is reported. The developed methodology employs a bidentate iridium‐N‐heterocyclic carbene‐phosphine complex for use at low catalyst loadings, and proceeds under an ...
Aidan McKeown +4 more
wiley +1 more source
Rapid Assembly of the Salvileucalin B Norcaradiene Core [PDF]
, 2010 Preparation of the polycyclic core of the cytotoxic natural product salvileucalin B is described. The key feature of this synthetic strategy is a copper-catalyzed intramolecular arene cyclopropanation to provide the central norcaradiene.
Levin, Sergiy +2 more
core +1 more source
Enantioselective Total Synthesis of (+)-Psiguadial B [PDF]
, 2016 The first enantioselective total synthesis of the cytotoxic natural product (+)-psiguadial B is reported. Key features of the synthesis include (1) the enantioselective preparation of a key cyclobutane intermediate by a tandem Wolff rearrangement ...
Beck, Jordan C. +3 more
core +3 more sources
Advanced Synthesis &Catalysis, EarlyView.A stereoselective one‐step (3 + 3)‐cycloaddition between in situ generated pyrrole‐3‐methides and carbonyl ylides has been developed using cooperative rhodium and chiral phosphoric acid catalysis. The reaction affords oxa‐bridged cyclohepta[1,2‐b]pyrroles bearing three stereogenic centers, including two quaternary ones, in high yields and ...
Philipp Stehr, Christoph Schneider
wiley +1 more source
Beilstein Journal of Organic Chemistry, 2014 Pd-catalyzed enantioselective alkylation in conjunction with further synthetic elaboration enables the formal total syntheses of a number of “classic” natural product target molecules. This publication highlights recent methods for setting quaternary and
Yiyang Liu +11 more
doaj +1 more source