Results 111 to 120 of about 28,644 (231)

CuI-Catalyzed Asymmetric [3 + 2] Cycloaddition of Azomethine Ylides with Cyclobutenones.

Organic Letters, 2018
The catalytic asymmetric 1,3-dipolar cycloaddition of cyclobutenones with azomethine ylides provides straightforward access to densely substituted 3-azabicyclo[3.2.0]heptanes.
Javier Corpas, Alberto Ponce, J. Adrio, J. Carretero   +3 more
semanticscholar   +1 more source

Синтез і хімічні властивості конденсованих та спіросполучених похідних піролу [PDF]

, 2018
У дисертаційній роботі досліджено стереохімію та регіонаправленість фор-мування продуктів у процесах 1,3-диполярного циклоприєднання азометин-ілідів на основі ізатину та циклічних і аліфатичних α-амінокислот до похідних N-заміщених малеїнімідів ...
Павловська, Т.Л.
core  

Copper(I)-Catalyzed Asymmetric 1,3-Dipolar Cycloaddition of Azomethine Ylides with Fluorinated Imines: The Expanded Scope and Mechanism Insights.

Journal of Organic Chemistry, 2018
The mechanism of the Cu(I)/( S, Rp)-PPFOMe-catalyzed 1,3-dipolar cycloaddition of azomethine ylides with fluorinated aldimines has been studied using labeling experiments, control experiments, and linear effect experiments, which clearly ruled out the 1 ...
Liang Wei, Qing‐Hua Li, Chun‐Jiang Wang   +2 more
semanticscholar   +1 more source

Electron-rich benzofulvenes as effective dipolarophiles in copper(i)-catalyzed asymmetric 1,3-dipolar cycloaddition of azomethine ylides. [PDF]

Chem Sci, 2023
Chang X, Liu XT, Li F, Yang Y, Chung LW, Wang CJ.   +5 more
europepmc   +1 more source

Organocatalytic [3 + 2] cycloaddition of oxindole-based azomethine ylides with 3-nitrochromenes: a facile approach to enantioenriched polycyclic spirooxindole-chromane adducts.

Organic and biomolecular chemistry, 2018
An organocatalytic asymmetric [3 + 2] cycloaddition of oxindole-based azomethine ylides with 3-nitro-2H-chromenes has been developed. This reaction provides a facile approach to densely functionalized polycyclic spirooxindole-chromane adducts featuring ...
Shiqi Wu, Guodong Zhu, Shiqiang Wei, Hongbo Chen, Jingping Qu, Baomin Wang   +5 more
semanticscholar   +1 more source

Kinetic Resolution of Alkylidene Norcamphors via a Ligand-Controlled Umpolung-Type 1,3-Dipolar Cycloaddition

iScience, 2019
Summary: Development of a general catalytic and highly efficient method utilizing readily available precursors for the regio- and stereoselective construction of bioactive natural-product-inspired spiro architectures remains a formidable challenge in ...
Chong Shen, Yuhong Yang, Liang Wei, Wu-Wei Dong, Lung Wa Chung, Chun-Jiang Wang   +5 more
doaj  

Catalytic asymmetric synthesis of highly substituted pyrrolizidines [PDF]

, 2012
A catalytic asymmetric double (1,3)-dipolar cycloaddition reaction has been developed. Using a chiral silver catalyst, enantioenriched pyrrolizidines can be prepared in one flask from inexpensive, commercially available starting materials.
Codelli, Julian A., Lim, Andrew D., Reisman, Sarah E.   +2 more
core  

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

Design, Synthesis and In Vitro Mechanistic Investigation of Novel Hexacyclic Cage-Like Hybrid Heterocycles

Molecules, 2019
Novel hexacyclic cage-like hybrid heterocycles have been synthesized in excellent yields employing a relatively less explored non-stabilized azomethine ylides derived from acenaphthenequinone and tyrosine with functionalized dipolarophiles using [3 + 2]
Suresh Kumar Raju, Abdulrahman I. Almansour, Arumugam Natarajan, Faruq Mohammad   +3 more
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