Results 81 to 90 of about 231,579 (192)

An Overlooked Pathway in 1,3-Dipolar Cycloadditions of Diazoalkanes with Enamines. [PDF]

Angew Chem Int Ed Engl, 2022
Li L, Mayer P, Stephenson DS, Ofial AR, Mayer RJ, Mayr H.   +5 more
europepmc   +1 more source

Retro‐Hetero‐Michael Addition Strategies in Organic Synthesis

European Journal of Organic Chemistry, Volume 29, Issue 32, 24 August 2026.
In this review, synthetic approaches to carbo‐ and heterocyclic compounds, including natural products, published in the last 15 years (2011–2025) which have either relied upon or included a retro‐hetero‐Michael addition step at any stage are discussed.
Dina Scarpi, Ernesto G. Occhiato
wiley   +1 more source

Stereoselective intramolecular 1,3-dipolar cycloadditions

, 2001
An in depth account of intramolecular 1,3-dipolar cycloadditions involving dipoles such as nitrile oxides, silyl nitronates, H-nitrones, azides, and nitrilimines is presented with particular emphasis on the stereochemistry during the cyclo addition ...
HASSNER, A, NAMBOOTHIRI, INN
core  

Current trends towards the synthesis of bioactive heterocycles and natural Products Using 1,3-Dipolar Cycloadditions (1,3-DC) with Azomethine Ylides

, 2019
This review summarizes the trends in the formation of complex or not so complex heterocyclic structures through 1,3-dipolar cy­cloadditions of azomethine ylides.
Sansano, José M., Gracia Retamosa, María de, Döndas, H. Ali   +2 more
core   +1 more source

Electrocyclic Ring‐Opening of 1,2,4‐Oxadiazole[4,5‐a]piridinium Chloride: a New Route to 1,2,4‐Oxadiazole Dienamino Compounds

ChemistryOpen, 2019
1,2,4‐Oxadiazole[4,5‐a]piridinium chloride adds nucleophiles to undergo electrocyclic ring opening affording 1,2,4‐oxadiazole dienamino derivatives. These pyridinium salts represent a special class of Zincke salts that are prone to rearrange when treated
Dr. Stefano Carella, Dr. Misal Giuseppe Memeo, Prof. Paolo Quadrelli   +2 more
doaj   +1 more source

1,3-dipolar cycloaddition reactions of C-60 with 3-phenyl-phthalazinium-1-olate. A theoretical study

, 2002
1,3-Dipolar cycloaddition products of the reaction between C-60 and 1-phenyl-phthalazinium-1-olate were studied within the framework of AM1(RHF) level. The reactions involving the double bond between two hexagons and a hexagon and a pentagon, as well as ...
Türker, Burhan Lemi
core  

Lewis Acid-Catalyzed Enantioselective 1,3-Dipolar Cycloadditions of Diazoalkane:  Chiral Ligand/Achiral Auxiliary Cooperative Chirality Control

, 2016
Lewis Acid-Catalyzed Enantioselective 1,3-Dipolar Cycloadditions of Diazoalkane:  Chiral Ligand/Achiral Auxiliary Cooperative Chirality ...
Shuji Kanemasa (2513860), Toshio Kanai (2409802)   +1 more
core   +1 more source

A Novel Cycloaddition Reaction of Thermally Generated Sulfenes

CHIMIA, 1992
The highly strained ?-sultine 4, resulting from the addition of SO2 to benzobenzvalene, is shown to undergo a thermal cycloreversion which gives 1H-indene-1-thiocarbaldehyde dioxide (6) as an intermediate and subsequently 1H-indene-1 ...
Ulrich Burger, Serge P. Schmidlin, Jiri Mareda, Gerald Bernardinelli   +3 more
doaj   +2 more sources

SuFExable NH-Pyrazoles via 1,3-Dipolar Cycloadditions of Diazo Compounds with Bromoethenylsulfonyl Fluoride. [PDF]

J Org Chem, 2022
Yamanushkin P, Kaya K, Feliciano MAM, Gold B.   +3 more
europepmc   +1 more source

Acceleration of 1,3-Dipolar Cycloadditions by Integration of Strain and Electronic Tuning. [PDF]

J Am Chem Soc, 2021
Dones JM, Abularrage NS, Khanal N, Gold B, Raines RT.   +4 more
europepmc   +1 more source