Results 41 to 50 of about 18,239,073 (189)
1,3-Dipolar cycloadditions of azomethine imines [PDF]
, 2015 Azomethine imines are considered 1,3-dipoles of the aza-allyl type which are transient intermediates and should be generated in situ but can also be stable and isolable compounds.
Nájera, Carmen +2 more
core +1 more source
CHIMIA, 1992 Adducts obtained by 1,3-dipolar cycloadditions to 2,3-dihydroisothiazol-3-one 1,1-dioxides are inclined to undergo a cheletropic process, by which the newly formed heterocyclic part undergoes aromatization, while SO2 is extruded and an ...
Kaspar F. Burri
doaj +2 more sources
Beilstein Journal of Organic Chemistry, 2016 The one-pot [3 + 2] cycloaddition of an azomethine ylide with a maleimide followed by another [3 + 2] cycloaddition of an azide with the second maleimide gives a 1,5-diamino intermediate which is used for a sequential aminomethylation reaction with ...
Xiaofeng Zhang +6 more
doaj +1 more source
Cristais líquidos termotrópicos calamíticos contendo o heterociclo [1,2,3]-triazol 1,4-dissubstituído [PDF]
, 2006 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Graduação em QuímicaA síntese e as propriedades térmicas de cinco séries homólogas de compostos calamíticos lineares e não lineares,
Santos, Deise Maria Pereira de Oliveira
core
1 : 3 Dipolar Cycloaddition of Benzonitrile Oxide on to Cinnamyl Arylamines
, 1971 1:3 Dipolar Cycloaddition of Benzonitrile Oxide on to Cinnamyl Arylamines.
Mohan, Suresh +2 more
openaire +2 more sources
Synthesis of novel phosphorylated chrysin derivatives by 1, 3-dipolar cycloaddition reaction
Phosphorus, Sulfur, and Silicon and the Related Elements, 2016 Through 1,3-dipolar cycloaddition reaction, 1,4,5-trisubstituted-1,2,3-triazole and phosphate-containing chrysin derivatives were synthesized with high yields. The target compounds were characterized by 1H, 31P, 13C NMR spectroscopy and HRMS.
Shaohua Zhu +5 more
openaire +1 more source
Asymmetric 1,3-Dipolar Cycloadditions to 5-Menthyloxy-2[5H]-furanones. [PDF]
, 1988 Cycloadditions of various 1,3-dipolar reagents to chiral butenolides 1 and 5 proceed with diastereomeric excess of 20-100%.
Lange, Ben de, +5 more
core +2 more sources
Angewandte Chemie, Volume 138, Issue 38, 14 September 2026.A stereoselective functionalization method of cyclic imines under mild organocatalytic conditions was developed. Bifunctional cinchona alkaloid catalysts combined with carefully optimized reaction conditions to suppress background reactivity enabled highly enantio‐ and diastereoselective addition reactions of malonates to cyclic imines.
Frederic Kölblin, Helma Wennemers
wiley +2 more sources
Studies in Conjugated lmines: Nucleophilic Additions and the 1 ,3-Dipolar Cycloadditions
, 1970 Studies in Conjugated lmines: Nucleophilic Additions and the 1 ,3-Dipolar ...
Singh, Nazar, P. S. Sethi
openaire +1 more source
Organocatalytic Formal (3+2+1)‐Cycloaddition of Allenoates, Michael Acceptors, and Carbaldehydes
Chemistry – A European Journal, EarlyView.The use of secondary amine Lewis base organocatalysts allows for the unprecedented activation of allenoates for formal (3+2+1)‐cycloadditions with Michael acceptors and aromatic carbaldehydes. ABSTRACT Employing secondary amines as covalently interacting Lewis basic organocatalysts allows for the activation of electron‐deficient allenes (allenoates ...
David Naderer +5 more
wiley +1 more source