Results 111 to 120 of about 18,263,514 (224)

Estudo das reações do acido de meldrum a bases de Schiff aromaticas [PDF]

, 1997
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciencias Fisicas e MatematicasOs compostos imínicos possuem reatividade semelhante a dos compostos carbonílicos, ambos apresentam ligações heteropolares insaturadas.
Rosa, Flavia Aparecida Fernandes da
core  

Ambimodal Dipolar/Diels–Alder Cycloaddition Transition States Involving Proton Transfers

, 2018
Quantum mechanical computations and molecular dynamics simulations have been used to elucidate the factors that control reaction outcomes in ambi­modal transition states leading to both dipolar and Diels–Alder cycloaddition products, which can ...
K. N. Houk, K. N. Houk (1247004), Shuming Chen (1590061), Shuming Chen, Peiyuan Yu (1499551), Peiyuan Yu   +5 more
core   +1 more source

Design, Synthesis, enzyme inhibitory activity and molecular docking studies of new 1,2,3-triazole linked nucleobases

Results in Chemistry
Thirteen novel 1,2,3-triazole linked nucleobases (5a-m) were designed and efficiently synthesized as potential human enzyme inhibitors. The target compounds were synthesized by using Copper (I)-catalysed Huisgen-Sharpless-Meldal 1,3-dipolar cycloaddition
Aditya Aggarwal, Chanchal Vashisth, Komal Bharti, Neera Raghav, Surender Kumar   +4 more
doaj   +1 more source

Isotelluroureas for Asymmetric C1 Ammonium Enolate Reactions

European Journal of Organic Chemistry, Volume 29, Issue 31, 19 August 2026.
Chiral isotelluroureas are powerful catalysts for a variety of C─C bond forming C1 ammonium enolate transformations. Isotelluroureas (ITeUs) have recently been introduced as a novel class of highly nucleophilic Lewis base catalysts. Herein, we systematically screened them for their potential to facilitate C1 ammonium enolate transformations and ...
Fereshteh Khorasani, Lotte Stockhammer, Magdalena Piringer, Mario Waser   +3 more
wiley   +1 more source

Transition metal catalyzed 1-3-dipolar cycloaddition of carbethoxycarbene to acrylonitrile [PDF]

Tetrahedron Letters, 1974
Paulissen, R., Moniotte, Ph, Hubert, André J., Teyssié, Philippe   +3 more
openaire   +2 more sources

1, 3-Dipolar Cycloaddition of Nitrones to Enamines

Nippon kagaku zassi, 1971
Otohiko TSUGE, Masashi TASHIRO, Yoko NISHIHARA   +2 more
openaire   +2 more sources

1, 3-Dipolar Cycloaddition Reaction of Aziridinedicarboximide

Chemical and Pharmaceutical Bulletin, 1968
OIDA, SADAO, OHKI, EIJI
openaire   +2 more sources

1,3-Dipolar [3 + 3] cycloaddition of α-halohydroxamate-based azaoxyallyl cations with hydrazonoyl chloride-derived nitrile imines

, 2017
Promoted by Et3N, the 1,3-dipolar [3 + 3] cycloaddition of α-halohydroxamate-based azaoxyallylcations with hydrazonoyl chloride-derived nitrile imines occurred efficiently, and furnished desired products in acceptable chemical yields.
Yu-Di Zhao, Yue-Yang Liu, Juan Du, Li-Jiao Zhao, Xiao-Qin Chen, Ning-Ning Feng, Xiu-Qing Song, Hai-Liang Pang, Hong-Wu Zhao   +8 more
core   +1 more source

1-3 dipolar cycloadditions of nitrile ylides [PDF]

, 1972
1-3 dipolar cycloaddition is the union of a 1-3 dipole, a-b-c, with a system containing a multiple bond, d-e, to form a five membered ring. In this scheme, center c contains an electron sextet, and concommitant positive charge, while center c contains an
Braff, Steven Paul
core  

Green Synthesis of Heterocyclic Systems by 1,3-Dipolar Cycloaddition-Initiated Transformations

, 2019
Diastereomerically enriched heterocyclic compounds play a significant role in medicinal chemistry and natural products. 1,3-Dipolar cycloaddition-initiated pot, atom and step economic ( PASE) synthesis is a powerful strategy for the construction of ...
Zhang, Xiaofeng
core   +1 more source