Results 171 to 180 of about 70,546 (390)

Palladium‐Catalyzed [3+2] Cycloadditions of Alkylidenecyclopropanes to Imines: A Direct Approach to Pyrrolidine Scaffolds

ChemistryEurope, EarlyView.
Pd‐catalyzed annulations of ACPs with different C=N partners in both inter‐ and intramolecular ways are described. The methods provide access to pyrrolidines and pyrrolidine‐fused polycyclic systems, featuring β‐exo‐methylene moieties. Preliminary enantioselective variant has been shown by using a chiral phosphoramidite ligand and DFT studies shed ...
Ricardo Rodiño, Felipe Verdugo, José L. Mascareñas, Fernando López   +3 more
wiley   +1 more source

Synthesis of Pyrrolidine Derivatives with Anticholinergic Properties. III. Syntheses and Stereochemistry of 1, 2, 5-Trimethylpyrrolidine and 3-(Diphenylmethylene)-1, 2, 5-trimethylpyrrolidine

, 1968
S. OHKI, MOTOYO YOSHINO
openalex   +2 more sources

Shihunine : A New Phthalide-Pyrrolidine Alkaloid

, 1964
Yasuo Inubushi, Yoshisuke Tsuda, Takeshi Konita, Saichi Matsumoto   +3 more
openalex   +2 more sources

Flexibility of the pyrrolidine ring in proline peptides [PDF]

, 1979
Vincent Madison
openalex   +1 more source

Visible‐Light Photocatalysis for Sustainable Chromene Synthesis and Functionalization

Chemistry – A European Journal, EarlyView.
Visible‐light photocatalysis provides sustainable and versatile methods for the synthesis and functionalization of chromene derivatives. This review compiles cutting‐edge methodologies, highlighting transformations such as multicomponent reactions, cross‐dehydrogenative coupling reactions, diverse cascade processes, and Giese‐type additions.
Paula Pérez‐Ramos, Georgia Biniari, Raquel G. Soengas, Humberto Rodríguez‐Solla, Carmen Simal   +4 more
wiley   +1 more source

Synthesis of Pyrrolidine Ring of Nicotine from Several C14-labeled Metabolites by Nicotiana rustica

, 1962
Pei-Hsing Lin Wu, Thomas S. Griffith, Richard U. Byerrum   +2 more
openalex   +1 more source

Redox-neutral α-functionalization of pyrrolidines: facile access to α-aryl-substituted pyrrolidines

RSC Advances
Using a quinone monoacetal as the oxidant and DABCO as the base, we report the one-step synthesis of α-aryl-substituted pyrrolidines from pyrrolidine. The reaction of pyrrolidine and quinone monoacetal in 2,2,2-trifluoroethanol afforded octahydro-dipyrroloquinoline in high yield.
Feng-Xian Tian, Fan-Fan Liu, Jian Wei, Jia-Xi Xiao, Jin Qu   +4 more
openaire   +2 more sources

In Situ Generation by Cyclization of an Organic Structure Directing Agent for the Synthesis of High Silica Zeolite ERS‐7

Chemistry – A European Journal, EarlyView.
A synthetic route is established to high silica zeolite ERS‐7 templated by a dimethylpyrrolidinium organic structure directing agent (OSDA) in the presence of a cationic polymer, both formed in situ from organic precursors. The polymer enables the cyclization that gives the OSDA and inhibits the crystallization of the competing zeolite mordenite ...
Magdalena M. Lozinska, Ruxandra G. Chitac, Elliott L. Bruce, Malavika Manoj, Yuanyuan Du, Daniel M. Dawson, Sharon E. Ashbrook, Paul A. Cox, Paul A. Wright   +8 more
wiley   +1 more source

Fused Nitrogen Bridgehead N,O‐Acetals as Versatile Scaffolds: Synthetic Strategies, Mechanism and Applications

Chemistry – A European Journal, EarlyView.
Fused nitrogen‐bridgehead N,O‐acetals receive specific emphasis as pivotal scaffolds due to their significant role in the bioactivity of medicinally relevant molecules. Significant approaches have been reported on their role as key synthetic building blocks/motifs in the construction of complex organic molecules and their utility as chiral auxiliaries ...
Alexis D. Kouvelas, Michael G. Kallitsakis, Ioannis N. Lykakis   +2 more
wiley   +1 more source

Vinylogous aldol reaction of heterocyclic silyloxy dienes. Application in synthesis [PDF]

, 2000
A versatile, readily accessible triad of 2-enoxy silane synthons derived from furan, pyrrole, and thiophene is presented. These heterocycles, in reacting with carbonyl and carbonyl- related acceptors, act as vinylogous nucleophile modules, giving rise ...
Casiraghi, Giovanni, Rassu, Gloria Maria Rita, Zanardi, Franca   +2 more
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