Results 11 to 20 of about 291 (140)

Cobalt catalyst with exclusive metal-centered chirality for asymmetric photocatalysis [PDF]

Nature Communications
For decades, progress in chiral transition metal catalysis has been closely linked to the design of tailor-made chiral ligands. Recently, an alternative to this conventional paradigm has emerged in which the overall chirality of the catalysts arises ...
Su-Yang Yao, Marco Villa, Yuan Zheng, Antonio Fiorentino, Barbara Ventura, Sergei I. Ivlev, Paola Ceroni, Eric Meggers   +7 more
doaj   +2 more sources

Substituent Effects Govern the Efficiency of Isoxazole Photoisomerization to Carbonyl‑2H‑Azirines [PDF]

ACS Organic & Inorganic Au
Kyra E. Jackson, Isabelle Szeto, Leah M. Seebald, Samuel G. Shepard   +3 more
doaj   +2 more sources

Selective Synthesis of 3‑(1H‑Tetrazol-5-yl)-indoles from 2H‑Azirines and Arynes [PDF]

ACS Omega
Carla Grosso, Cláudia Alves, Terver J. Sase, Nuno G. Alves, Ana L. Cardoso, Américo Lemos, Teresa M. V. D. Pinho e Melo   +6 more
doaj   +2 more sources

Synthesis and Application of Bioactive N-Functionalized Aziridines. [PDF]

Angew Chem Int Ed Engl
This review discusses modern synthetic methods for the preparation of aziridine‐containing small molecules, including biocatalytic, electrocatalytic, and photocatalytic strategies. We highlight the compatibility of various synthetic methods with control of the exocyclic N‐substituent.
Tan H, Samanta S, Qiu N, Adibekian A, Powers DC.   +4 more
europepmc   +3 more sources

Synthesis of Δ1‑Pyrrolines via Formal (3 + 2)-Cycloaddition of 2H‑Azirines with Enones Promoted by Visible Light under Continuous Flow [PDF]

ACS Omega
Lorena S. R. Martelli, Lucas G. Furniel, Pedro H. O. Santiago, Javier Ellena, Arlene G. Corrêa   +4 more
doaj   +2 more sources

2H-Azirines as dipolarophiles [PDF]

Tetrahedron Letters, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Melo, Teresa M. V. D. Pinho e, Cardoso, Ana L., Gomes, Clara S. B., Gonsalves, António M. d'A. Rocha   +3 more
openaire   +2 more sources

Organo-photocatalytic Synthesis of Functionalized Pyrroles from 2H-Azirines and α-Substituted Nitroalkenes

SynOpen, 2022
An efficient organo-photocatalytic method for the synthesis of tetrasubstituted pyrroles bearing a ketone, ester, alcohol, or nitro group at the 3-position has been developed.
Lalita Devi, Poornima Mishra, Ayushi Pokhriyal, Namrata Rastogi   +3 more
doaj   +1 more source

Reactivity of 2-halo-2H-azirines. Part 3: Dehalogenation of 2-halo-2H-azirine-2-carboxylates [PDF]

Tetrahedron, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Pinho e Melo, Teresa M. V. D., Cardoso, Ana L., Gonsalves, António M. d'A. Rocha   +2 more
openaire   +2 more sources

Acetyl oxime/azirine 1, 3-dipole and strategy for the regioselective synthesis of polysubstituted pyrroles via [3 + 2] cycloaddition with alkyne utilizing Fe2O3@cellulose catalyst

Results in Chemistry, 2021
Fe2O3@cellulose catalyzed regioselective [3 + 2] cycloaddition of acetyl oxime with alkynes via 2H‑azirines intermediate generated in situ in an aqueous ethanolic medium is described.
Kartikey Dhar Dwivedi, Bhupender Kumar, Marri Sameer Reddy, Biplob Borah, J. Nagendra Babu, L. Raju Chowhan   +5 more
doaj   +1 more source

[3 + 2]-Cycloadditions of nitrile ylides after photoactivation of vinyl azides under flow conditions

Beilstein Journal of Organic Chemistry, 2013
The photodenitrogenation of vinyl azides to 2H-azirines by using a photoflow reactor is reported and compared with thermal formation of 2H-azirines. Photochemically, the ring of the 2H-azirines was opened to yield the nitrile ylides, which underwent a [3
Stephan Cludius-Brandt, Lukas Kupracz, Andreas Kirschning   +2 more
doaj   +1 more source