Results 81 to 90 of about 1,216 (196)

Regiodivergent Synthesis of Butenolide-Based α- and β‑Amino Acid Derivatives via Base-Controlled Azirine Ring Expansion

, 2020
A method for the preparation of 5-aminobutenolides from 2-bromo-2H-azirine-2-carboxylic esters/amides with arylacetic acids has been developed. The reaction regioselectivity can be switched by a change of the basic catalyst, making it possible to prepare
Pavel A. Sakharov (5519120), Alexander F. Khlebnikov (1537960), Mikhail S. Novikov (1537957), Nikolai V. Rostovskii (4610311)   +3 more
core   +1 more source

Synthesis of Isoxazole- and Oxazole-4-carboxylic Acids Derivatives by Controlled Isoxazole-Azirine-Isoxazole/Oxazole Isomerization

, 2019
The first synthesis of isoxazole-4-carboxylic acid derivatives by domino isoxazole-isoxazole isomerization is reported. Fe­(II)-catalyzed isomerization of 4-acyl-5-methoxy-/5-aminoisoxazoles (dioxane, 105 °C) leads to the formation of isoxazole-4 ...
Alexander F. Khlebnikov (1537960), Mikhail S. Novikov (1537957), Anna V. Serebryannikova (7832108), Ekaterina E. Galenko (4003724)   +3 more
core   +2 more sources

Intermolecular alkyl radical addition to methyl 2-(2,6-Dichlorophenyl)-2H-azirine-3-carboxylate [PDF]

, 2012
The 2H-azirine 1 acts as an effective radical acceptor for secondary and tertiary alkyl iodides mediated by triethylborane.
Guimaraes, Emanuel, Alves, Maria José Chão, Lemos, A., Fortes, Gil   +3 more
core   +1 more source

2H-Azirines as electrophiles

, 2011
2H-Azirines have shown an unusual potential to synthesise aziridines and other types of compounds. Many functionalized aziridines can be produced by addition of O-, S-,N-, C-nucleophiles and hydride to 2H-azirines. This review is designed to give an overview of the reactivity of 2H-azirines as electrophiles along the years and their usefulness in the ...
Alves, M. José, Costa, Flora Teixeira e
openaire   +1 more source

Photochemistry of 3-amino-1,2-benzisoxazole: unexpected photoisomerization of an amino-spiro-2H-azirine to a 1H-diazirine

, 2016
UV irradiation of 3-amino-1,2-benzisoxazole isolated in an argon matrix leads to the formation of an amino-spiro-2H-azirine. The amino-spiro-2H-azirine was found to photoisomerize back to 3-amino-1,2-benzisoxazole and also to a 1H-diazirine, which ...
MARTINS RIBEIRO DA SILVA LOURENCO, Rui Fausto, Nunes, Cláudio M., Pinto, Sandra M. V., Reva, Igor   +3 more
core   +1 more source

A Review on the Photochemistry of 2H-Azirines [PDF]

HETEROCYCLES, 1977
Gilgen, Paul, Heimgartner, Heinz, Schmid, Hans, Hansen, Hans-Jürgen   +3 more
openaire   +2 more sources

5-Amino Pyrimidine Synthesis via Azirine Skeletal Remodelling

A mild, metal-free annulative coupling of azirine-2H-carbaldehydes with benzamidine hydrochlorides is reported for the efficient synthesis of substituted 5-amino pyrimidines.
Anjali Chaturvedi, Vishal Sharma, Virender Singh   +2 more
core   +1 more source

PHOTOREACTIONS WITH C60-FULLERENE - [3+2] PHOTOCYCLOADDITION OF 2,3-DIPHENYL-2H-AZIRINE

, 1994
AVERDUNG J, ALBRECHT E, LAUTERWEIN J, et al. PHOTOREACTIONS WITH C60-FULLERENE - [3+2] PHOTOCYCLOADDITION OF 2,3-DIPHENYL-2H-AZIRINE. Chemische Berichte. 1994;127(4):787-789.Upon irradiation 2,3-Diphenyl-2H-azirine (2) is added to C60 1 with formation of
Mattay, Jochen, LAUTERWEIN, J, LUFTMANN, H, MULLER, WH, AVERDUNG, J, MOHN, H, TERMEER, HU, ALBRECHT, E   +7 more
core   +1 more source

2H-azirine 3-phosphonates: a new class of chiral iminodienophiles. Asymmetric synthesis of quaternary piperidine phosphonates

, 2002
Diels−Alder reactions of enantiomerically enriched 2H-azirine 3-phosphonates and dienes stereoselectively furnish optically pure, bicyclic aziridine adducts that on hydrogenation afford the first examples of enantiopure quaternary piperidine ...
Wu, Yongzhong, Yan, Hongxing, Davis, Franklin A., McCoull, William, Prasad, Kavirayani R.   +4 more
core   +1 more source

The Chemistry of Azirines

Journal of Synthetic Organic Chemistry, Japan, 1972
TANIGUCHI, Hiroshi, ISOMURA, Kazuaki
openaire   +2 more sources