Results 11 to 20 of about 119,652 (298)

Kinetic Resolution of β-Alkyl Phenylethylamine Derivatives through Palladium-Catalyzed, Nosylamide-Directed C−H Olefination

Molecules, 2023
Palladium-catalyzed C-H activation reactions have attracted the attention of organic researchers due to their unique high selectivity, broad functional group tolerance, and high efficiency, and they are widely used in natural products and asymmetric ...
Zeng Zhao, Jinxin Wang, Zhiteng Du, Yuzhu Li, Qingyan Sun, Huizi Jin   +5 more
doaj   +1 more source

Enantioselective Synthesis of (+)-Coerulescine by a Phase-Transfer Catalytic Allylation of Diphenylmethyl tert-Butyl α-(2-Nitrophenyl)Malonate

Frontiers in Chemistry, 2020
A 7-step enantioselective synthetic method for preparing (S)(+)-coerulescine is reported through the use of diphenylmethyl tert-butyl α-(2-nitrophenyl)malonate (16% overall yield, >99% ee).
Sangki Lee, Jewon Yang, Sehun Yang, Geumwoo Lee, Daehyun Oh, Min Woo Ha, Suckchang Hong, Hyeung-geun Park   +7 more
doaj   +1 more source

Enantioselective Synthesis of (+)‐Majusculone (I). [PDF]

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Douglass F, Taber, M Inthikhab, Sikkander, Pierre H, Storck   +2 more
openaire   +2 more sources

Isothiourea‐Catalyzed Enantioselective Functionalisation of Glycine Schiff Base Aryl Esters via 1,6‐ and 1,4‐Additions

ChemistryEurope, 2023
The enantioselective α‐functionalisation of glycine Schiff base aryl esters through isothiourea catalysis is successfully demonstrated for 1,6‐additions to para‐quinone methides (21 examples, up to 95 : 5 dr and 96 : 4 er) and 1,4‐ additions to methylene
Lotte Stockhammer, Rebecca Craik, Prof. Dr. Uwe Monkowius, Dr. David B. Cordes, Prof. Dr. Andrew D. Smith, Prof. Dr. Mario Waser   +5 more
doaj   +1 more source

Stereocontrolled enantioselective total synthesis of the [2+2] quadrigemine alkaloids [PDF]

, 2015
A unified strategy for enantioselective total synthesis of all stereoisomers of the [2+2] family of quadrigemine alkaloids is reported. In this approach, two enantioselective intramolecular Heck reactions are carried out at the same time on precursors ...
Canham, SM, Hafensteiner, BD, Lebsack, AD, May-Dracka, TL, Nam, S, Overman, LE, Stearns, BA   +6 more
core   +4 more sources

Synthesis of chiral malonates by α-alkylation of 2,2-diphenylethyl tert-butyl malonates via enantioselective phase-transfer catalysis

Frontiers in Chemistry, 2023
An efficient synthetic approach for chiral malonates was established via enantioselective phase transfer catalysis. The α-alkylation of 2,2-diphenylethyl tert-butyl α-methylmalonates with (S,S)-3,4,5-trifluorophenyl-NAS bromide as a phase-transfer ...
Zhibin Guo, Daehyun Oh, Min Sagong, Jewon Yang, Geumwoo Lee, Hyeung-geun Park   +5 more
doaj   +1 more source

Chiral separation by enantioselective liquid–liquid extraction [PDF]

, 2011
The literature on enantioselective liquid–liquid extraction (ELLE) spans more than half a century of research. Nonetheless, a comprehensive overview has not appeared during the past few decades.
Feringa, Ben L.,, Heeres, Hero J.,, Minnaard, Adriaan J.,, Schuur, Boelo,, Verkuijl, Bastiaan J.V.,, Vries, Johannes G. de,   +5 more
core   +3 more sources

Composition and Anti-Acetylcholinesterase Properties of the Essential Oil of the Ecuadorian Endemic Species Eugenia valvata McVaugh

Molecules, 2023
Alzheimer’s disease is a global health problem due to the scarcity of acetylcholinesterase inhibitors, the basis for symptomatic treatment of this disease; this requires new approaches to drug discovery.
James Calva, Maricarmen Silva, Vladimir Morocho   +2 more
doaj   +1 more source

Enantioselective Total Synthesis of (+)-Cassiol [PDF]

, 2009
An enantioselective total synthesis of (+)-cassiol is reported. The complex derived from Pd-2(pmdba)(3) and enantiopure t-BuPHOX ligand catalyzes enantioconvergent decarboxylative alkylation to generate the quaternary carbon stereocenter at an early ...
Mohr, Justin T., Petrova, Krastina V., Stoltz, Brian M.   +2 more
core   +2 more sources

Enantioselective Total Synthesis of Macfarlandin C, a Spongian Diterpenoid Harboring a Concave-Substituted cis-Dioxabicyclo[3.3.0]octanone Fragment. [PDF]

, 2020
The enantioselective total synthesis of the rearranged spongian diterpenoid (-)-macfarlandin C is reported. This is the first synthesis of a rearranged spongian diterpenoid in which the bulky hydrocarbon fragment is joined via a quaternary carbon to the ...
Allred, Tyler K, Dieskau, André P, Lackner, Gregory L, Overman, Larry E, Zhao, Peng   +4 more
core   +2 more sources