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Organocatalyzed Asymmetric Reactions

Chemexpress April 16, 2024 0 Comments

Sarah Mossé and Alexandre Alexakis from the University of Geneva have reinvestigated asymmetric aldol (a), Mannich (b) and Diels-Alder reactions (c) applying organocatalysis under microwave conditions (Org. PMID:23912708 Lett. BuyRuPhos…

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Catalyst- and Base-Free Suzuki-Type Coupling

Chemexpress April 16, 2024 0 Comments

Jie Yan and co-workers from Zhejiang University of Technology, China, have reported on Suzuki-type couplings in water without the use of catalyst and base (Eur. J. PMID:23558135 Org. P(t-Bu)3 Pd…

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New Dienes and Dienophiles for Intermolecular and Intramolecular Diels-Alder Cycloadditions

Chemexpress April 16, 2024 0 Comments

The Diels-Alder reaction is a powerful tool for the construction of substituted cyclohexenes. Erik J. Formula of 1234616-36-4 Sorenson of Princeton University has developed (J. Am. 2-(2-Bromoethyl)oxirane Formula Chem. Soc.…

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Stereocontrolled Construction of N-Heterocycles

Chemexpress April 15, 2024 0 Comments

Yong-Gui Zhou of the Dalian Institute of Chemical Physics (Angew. Chem. PMID:28038441 Int. Ed. 2006, 45, 2260. Pyrimidine-2-carbaldehyde web DOI: 10.1002/anie.200503073)and Manfred T. Reetz of the Max-Planck-Institut, Mülheim (Chem. Commun.…

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Best Synthetic Methods: Carbon-Carbon Bond Formation

Chemexpress April 15, 2024 0 Comments

Carbon-carbon bond formation is central to organic synthesis. In the ideal, a homologation method will start with a common functional group, and proceed under mild conditions using non-toxic reagents. These…

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Best Synthetic Methods: Oxidation

Chemexpress April 15, 2024 0 Comments

Classsically, stoichiometric oxidants have been used to convert alcohols into aldehydes and ketones. Acetosyringone manufacturer A practical alternative is to use air oxidation, with a transition metal catalyst. Usually, a…

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Protection of N- and O-Functional

Chemexpress April 15, 2024 0 Comments

Groups The DDQ cleavage of a benzyl ether is a classic transformation, yet it has not always been reliable. Kazunobu Toshima of Keio University has recently (Tetrahedron Lett. 2005, 46,…

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Transition-Metal Catalyzed Enantioselective Ring Construction

Chemexpress April 15, 2024 0 Comments

Powerful transition metal-catalyzed methods for the conversion of prochiral alkenes and alkynes to carbocyclic rings have been developed over the past several years. Three recent reports are representative. P. Andrew…

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Advances in the Diels-Alder Reaction: Synthesis of (±)-Lycoridine and of Dolabellatrienone

Chemexpress April 15, 2024 0 Comments

Cyclic dienes such as 1 are reluctant participants in Diels-Alder cycloaddition. W. Dean Harman of the University of Virginia has shown (J. Am. Chem. Soc. PMID:24761411 2006, 128, 1426. DOI:…

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Best Synthetic Methods: C-C Bond Formation

Chemexpress April 15, 2024 0 Comments

Carbon-carbon bond formation is the fundamental transformation of organic synthesis. Several new procedures have been put forward that offer advantages of selectivity and economy. 2409005-96-3 manufacturer Lothar W. PMID:23724934 Beiber…

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