Results 61 to 70 of about 5,333 (179)

One-pot asymmetric cyclocarbohydroxylation sequence for the enantioselective synthesis of functionalised cyclopentanes

, 2010
International audienceA new method has been developed for the enantioselective synthesis of highly functionalised cyclopentanes bearing up to three stereogenic centres with very high stereoselectivity.
Jean-Pierre Dulcère, Dulcère, Jean-Pierre, Jean Rodriguez, Damien Bonne, Rodriguez, Jean, Grégory Lettieri, Wilfried Raimondi, Raimondi, Wilfried, Lettieri, Grégory, Bonne, Damien   +9 more
core   +1 more source

Asymmetric synthesis of multifunctional cyclopentanes and cyclohexanes via oxycarbenium ion cyclizations of 5-alkoxy- 2(3h)-dihydrofuranones

, 1995
Intramolecular nucleophilic additions to oxycarbenium ions derived from 5-alkoxy-2(3)-dihydrofuranones gave substituted cyclopentanes or cyclohexanes in good yields. Stereoselectivity in these reactions was usually very high, while regioselectivity could
Oeveren, Arjan van, Geertsema, Edzard M., Meetsma, Auke, Leung, Chiu W., Feringa, Bernard, Arjan van Oeveren, Ben L. Feringa, Auke Meetsma, Chiu W. Leung, Edzard M. Geertsema   +9 more
core   +1 more source

Enantioselective synthesis of functionalized cyclopentanes [PDF]

, 2017
This diploma thesis deals with the synthesis of chiral five-membered carbacyclic molecules via iminium-enamine activation using chiral secondary amines. The first part of thi diploma thesis describes the synthesis of starting materials for domino Michael
Šotolová, Martina
core  

N-Heterocyclic carbene-catalyzed diastereoselective synthesis of β-lactone-fused cyclopentanes using homoenolate annulation reaction

, 2015
NHC-catalyzed annulation of enals with 2-enoylpyridines or 2-enoylpyridine N-oxides leading to the diastereoselective synthesis of β-lactone-fused cyclopentanes is reported. The reaction proceeds via the generation of homoenolate equivalent intermediates
Gonnade, Rajesh G., Mukherjee, Subrata, Patra, Atanu, Mondal, Santigopal, Biju, Akkattu T.   +4 more
core   +1 more source

Graphene with outstanding anti-irradiation capacity as multialkylated cyclopentanes additive toward space application

, 2015
Multialkylated cyclopentanes (MACs), a class of synthetic hydrocarbon fluid have attracted intensive interest as possible space lubricants due to a series of unique physical and chemical properties.
Fan, Xiaoqiang, Wang, Liping
core  

A Copper(II)-Mediated Regioselective Cyclization−Acetoxylation of 6,8-Dien-1-ones for the Synthesis of Functionalized Cyclopentanes

, 2016
This paper describes a copper(II) acetate-mediated cyclization−acetoxylation of 6,8-dien-1-ones in the presence of sodium acetate as base. A variety of functionalized cyclopentanes containing synthetic useful allylic alcohol moieties with three ...
Haifeng Du (1420057), Yazhou Wang (1508368)   +1 more
core   +2 more sources

Catalytic asymmetric desymmetrization approaches to enantioenriched cyclopentanes

, 2015
Catalytic asymmetric desymmetrization represents an excellent strategy for accessing highly functionalized chiral building blocks. However, the application of desymmetrization for the synthesis of enantio-enriched cyclopentane derivatives remained ...
Mukherjee, Santanu, Manna, Madhu Sudan
core   +1 more source

Immobilized Cobalt/Rhodium Heterobimetallic Nanoparticle-Catalyzed Silylcarbocylization and Carbonylative Silylcarbocyclization of 1,6-Enynes

, 2016
Reaction of 1,6-enynes with a hydrosilane in the presence of immobilized cobalt/rhodium bimetallic nanoparticles gives 2-methyl-1-silylmethylidene-2-cyclopentanes in the absence of carbon monoxide and 2-formylmethyl-1-silylmethylidene-2-cyclopentanes ...
Il Gu Jung (2306782), Kang Hyun Park (2092693), So Yeon Kim (196803), Young Keun Chung (1599901)   +3 more
core   +1 more source

Stereoselective syntheses of 1,2-dialkyl-1-phenyl-cyclopentanes by intramolecular carbolithiation of vinyl sulfides

, 1995
6-Methylseleno-6-phenyl-1-phenylthio-1-heptene and 7-methylseleno-7-phenyl-2-phenylthio-2-octene produce 1-phenyl-2-(1'-phenylthioethyl)-cyclopentanes with high stereocontrol at all the three stereogenic centers on sequential reaction with butyllithium ...
Kenda, B., Bruno Remade, Krief, A., Alain Krief, Benoît Kenda, Remacle, B.   +5 more
core   +1 more source

Pd-Catalyzed Alkene Difunctionalization Reactions of Malonate Nucleophiles: Synthesis of Substituted Cyclopentanes via Alkene Aryl-Alkylation and Akenyl-Alkylation

, 2019
The Pd-catalyzed coupling of malonate nucleophiles with alkenes bearing tethered aryl or alkenyl triflates is described. These alkene difunctionalization reactions afford malonate-substituted cyclopentanes that contain fused aryl or cycloalkenyl rings ...
Derick R. White, Evan C. Bornowski (6634865), Elsa M. Hinds, John P. Wolfe (1317546), John P. Wolfe, Elsa M. Hinds (5566673), Evan C. Bornowski, Derick R. White (1600237)   +7 more
core   +1 more source