Catalytic Synthesis of 1,2,4,5‐Tetrasubstituted 1H‐Imidazole Derivatives: State of the Art

R Rossi, G Angelici, G Casotti… - … Synthesis & Catalysis, 2019 - Wiley Online Library
Tetrasubstituted 1H‐imidazoles are a large family of heteroarene derivatives that are known
to include natural products isolated from marine sponges and synthetic compounds …

Novel One-Pot, Four-Component Condensation Reaction: An Efficient Approach for the Synthesis of 2,5-Disubstituted 1,3,4-Oxadiazole Derivatives by a Ugi-4CR/aza …

A Ramazani, A Rezaei - Organic letters, 2010 - ACS Publications
A novel and efficient method has been developed for the synthesis of 2, 5-disubstituted 1, 3,
4-oxadiazole derivatives using (N-isocyanimino) triphenylphosphorane, a secondary amine …

A Triphenylphosphine‐Based Microporous Polymer for a Wittig Reaction Cycle in the Solid State

V Weigelt, S Vogl, J Schmidt, A Thomas - Angewandte Chemie, 2023 - Wiley Online Library
The Wittig reaction is a key step in industrial processes to synthesise large quantities of
vitamin A and various other important chemicals that are used in daily life. This article …

Iminophosphorane–phosphines: Versatile ligands for homogeneous catalysis

J Garcia-Alvarez, SE Garcia-Garrido… - Journal of Organometallic …, 2014 - Elsevier
Abstract Iminophosphoranes R 3 Pdouble bondNR are nitrogen analogues of phosphorus
ylides that can coordinate transition metals using the lone pair on the nitrogen atom. The …

Reversible P(III)/P(V) Redox: Catalytic Aza‐Wittig Reaction for the Synthesis of 4(3H)‐Quinazolinones and the Natural Product Vasicinone

L Wang, Y Wang, M Chen… - Advanced Synthesis & …, 2014 - Wiley Online Library
The catalytic aza‐Wittig reaction based on a phosphine/phosphine oxide catalytic cycle is
reported. The by‐product triphenylphosphine oxide (Ph3PO) was reduced in situ to …

Catalytic asymmetric homologation of α-ketoesters with α-diazoesters: synthesis of succinate derivatives with chiral quaternary centers.

W Li, X Liu, F Tan, X Hao, J Zheng, L Lin… - Angewandte …, 2013 - search.ebscohost.com
The one-carbon homologation of carbonyl compounds using diazo compounds is a
frequently encountered synthetic objective.[1] Several related reactions have been …

Synthesis of γ-azido-β-ureido ketones and their transformation into functionalized pyrrolines and pyrroles via staudinger/aza-wittig reaction

AA Fesenko, AD Shutalev - The Journal of Organic Chemistry, 2013 - ACS Publications
A simple two-step procedure yielding γ-azido-β-ureido ketones or/and their cyclic isomers, 6-
(1-azidoalkyl)-4-hydroxyhexahydropyrimidin-2-ones, has been developed. The synthesis …

Liquid-assisted grinding and ion pairing regulates percentage conversion and diastereoselectivity of the Wittig reaction under mechanochemical conditions

KL Denlinger, L Ortiz-Trankina, P Carr… - Beilstein Journal of …, 2018 - beilstein-journals.org
Mechanochemistry is maturing as a discipline and continuing to grow, so it is important to
continue understanding the rules governing the system. In a mechanochemical reaction, the …

Synthesis of sterically congested 1,3,4-oxadiazole derivatives from aromatic carboxylic acids, acenaphthoquinone, and (N-isocyanimino)triphenylphosphorane

A Ramazani, F Zeinali Nasrabadi… - Monatshefte für Chemie …, 2011 - Springer
Reactions of (N-isocyanimino) triphenylphosphorane with acenaphthoquinone in the
presence of aromatic carboxylic acids proceed smoothly at room temperature and under …

(N-Isocyanimino)triphenylphosphorane-Mediated, One-Pot, Efficient Synthesis of Sterically Congested 1,1,1-Trifluoro-2-(5-aryl-1,3,4-oxadiazol-2-yl)-2-propanol …

A Ramazani, N Shajari, AT Mahyari… - … , Sulfur, and Silicon, 2010 - Taylor & Francis
Reactions of (N-isocyanimino) triphenylphosphorane with 1, 1, 1-trifluoroacetone in the
presence of aromatic (or heteroaromatic) carboxylic acids (3-methylbenzoic acid, 1 …