Results 91 to 100 of about 13,198 (167)

Diethylzinc mediated 1 3 dipolar cycloaddition reaction of chiral azomethine ylides asymmetric synthesis of ferrocenyl substituted pyrrolidine derivatives

, 2002
Asymmetric synthesis of ferrocenyl-substituted pyrrolidine derivatives was successfully achieved by diethylzinc-mediated 1,3-dipolar cycloaddition reactions of chiral azomethine ylides with a number of electron-deficient dipolarophiles. Chiral azomethine
DİNÇER, Ülkü, Doğan, Özdemir, ÖNER, İmdat, ARICI, Cengiz, Arici, C, Dogan, O, Ulku, D, Oner, I   +7 more
core   +2 more sources

11H-Benzo[4,5]imidazo[1,2-a]indol-11-one as a New Precursor of Azomethine Ylides: 1,3-Dipolar Cycloaddition Reactions with Cyclopropenes and Maleimides. [PDF]

Int J Mol Sci, 2022
Filatov AS, Pronina YA, Selivanov SI, Shmakov SV, Uspenski AA, Boitsov VM, Stepakov AV.   +6 more
europepmc   +1 more source

An investigation of the scope of the 1,7-electrocyclization of α,b:γ,δ-conjugated azomethine ylides

, 2014
Substituents on the diene component have little influence on the periselectivity of the cyclizations of α,β:γ,δ-conjugated azomethine ylides, with 1,7-electrocyclizations predominating.
Anderson, Rosaleen J., Nyerges, Miklos, Ning, Fuquiang, Hibbs, David E., Platts, James A., Varadi, Linda, Anderson, Rosaleen, Platts, James Alexis, Zhang, Weimin, Ning, Fuqiang, Groundwater, Paul W., Groundwater, Paul   +11 more
core   +1 more source

Zinc-Catalyzed Enantioselective [3+2] Cycloaddition of Azomethine Ylides Using Planar Chiral [2.2]Paracyclophane-Imidazoline N,O-ligands. [PDF]

Angew Chem Int Ed Engl, 2022
Kumar SV, Guiry PJ.
europepmc   +1 more source

Construction of spirocycles containing highly substituted pyrroli-dine and 1-indanone motifs with spiro quaternary stereogenic centers via 1,3-dipolar cycloaddition of 2-alkylidene-1-indanone and azomethine ylides promoted by simple imidazolium salts

, 2015
The 1,3-dipolar cycloaddition of 2-alkylidene-1-indanone with azomethine ylides has been developed successfully promoted by simple imidazolium salts to construct a variety of spirocycles containing highly substituted pyrrolidines efficiently, affording ...
Hu, Wei-Qiang, Dou, Pei-Hao, Fu, Ji-Ya, Cui, Yan-Su, Wu, Zhi-Jun, Liu, Yong, Zhang, Chuan-Bao, Niu, Song-Yang, Fu, JY (reprint author), Henan Univ, Coll Chem & Chem Engn, Henan Engn Lab Flame Retardant & Funct Mat, Inst Fine Chem & Engn, Kaifeng 475004, Henan, Peoples R China.   +8 more
core   +1 more source

Diastereoselective 1,3-dipolar cycloadditions of new azomethine ylides derived from trifluorothioacetamides or cyanothioformamides

, 2002
Deprotonation of trifluoromethyl or cyano thioamidium salts generates new azomethine ylides which undergo cycloaddition to dipolarophiles with high diastereoselectivity.
Laduron, Frédéric, Viehe, Heinz G.
core   +1 more source

Straightforward Synthesis of Thiophene Bioisosteres of the Pyrrolo[3,2-c]quinoline Framework from Martinelline Alkaloids

Molbank
We report the first green and diastereoselective synthesis of novel thiophene bioisosteres designed to mimic the privileged pyrrolo[3,2-c]quinoline core of martinelline alkaloids.
Tamer S. Saleh, Abdullah S. Al-Bogami
doaj   +1 more source

[3 + 2] cycloaddition of nonstabilized azomethine ylides and 2-benzothiazolamines to access imidazolidine derivatives. [PDF]

RSC Adv, 2022
Wang KK, Li YL, Wang MY, Jing J, Wang ZY, Chen R.   +5 more
europepmc   +1 more source

Peptide Macrocyclization via Cu-catalyzed 1,3-Dipolar Cycloaddition of Azomethine Ylides [PDF]

Cyclic peptides are highly valued synthetic targets in organic and medicinal chemistry. The development of new synthetic methodologies for peptide macrocyclization, different from classical lactamization, is essential for the progress of the field ...
Francisco Javier, Adrio, Juan Carlos, Carretero, Inés, Alonso, Enrique, Gallent, Nuria, Rodriguez   +4 more
core   +1 more source

Rhodium(III)-Catalyzed Annulation of Azomethine Ylides with Alkynes via CH Activation

, 2013
The rhodium(III)-catalyzed coupling of azomethine ylides with alkynes via CH activation has been developed for the synthesis of indenamines in moderate to high yields.
Zhen, Wencui, Chen, Yuye, Wang, Fen, Li, Xingwei   +3 more
core   +1 more source