Results 41 to 50 of about 4,540 (259)
HBF4 Catalysed Nucleophilic Substitutions of Propargylic Alcohols [PDF]
, 2015 The activity of HBF4 (aqueous solution) as a catalyst in propargylation reactions is presented. Diverse types of nucleophiles were employed in order to form new C–O, C–N and C–C bonds in technical acetone and in air.
Barreiro, EB +5 more
core +2 more sources
Bis-bromine-1,4-diazabicyclo[2.2.2]octane Complex (DABCO-Br2): An Efficient and Versatile Reagent for Preparation of Dihydropyrimidinones as a New Protocol for the Biginelli Reaction [PDF]
شیمی کاربردی روز, 2011 A simple and efficient method for the one-pot Biginelli condensation reaction of aldehydes, β-dicarbonyl compounds and urea or thiourea employing tetrameric DABCO-bromine as a novel catalyst is described.
Gholam Hossein Mahdavinia +3 more
doaj +1 more source
Synthesis of 4 Phenyl 3,4 Dihydr Indeno[2′,1′]Pyrimidine 2 One on Different Amount of Catalysts [PDF]
, 2011 Dihydropirimidine is a heterocyclic compound which has important pharmacologic and therapeutic activities. This compound can be synthesised by using Biginelli reaction which involve three type of starting materials and also ...
Parmasari, M. (Megawati) +1 more
core +1 more source
, 2007 Department of Chemistry, Punjabi University, Patiala-147 002, Punjab, India E-mail: j_sandhu2002@yahoo.com Manuscript received 28 May 2007, revised 17 July 2007, accepted 18 July 2007 Recent advances In Biginelli reaction are summarized including its latest mechanism, developments In building blocks, catalysts variations, optimization/acceleration of ...
Saini, Anil +2 more
openaire +1 more source
Molbank, 2019 The Biginelli reaction is an acid-catalyzed, three-component reaction between an aldehyde, a hydrogen methylene active compound, and urea (or its analogue) and constitutes a rapid and easy synthesis of highly functionalized heterocycles.
Itamar Luís Gonçalves +8 more
doaj +1 more source
Lanthanum triflate triggered synthesis of tetrahydroquinazolinone derivatives of N-allyl quinolone and their biological assessment [PDF]
, 2012 A series of 24 derivatives of tetrahydroquinazolinone has been synthesized by one-pot cyclocondensation reaction of N-allyl quinolones, cyclic β-diketones and (thio)urea/N-phenylthiourea in presence of lanthanum triflate catalyst.
Jardosh Hardik H., Patel Manish P.
core +1 more source
POM@MOF hybrids : synthesis and applications [PDF]
, 2020 The hybrid materials that are created by supporting or incorporating polyoxometalates (POMs) into/onto metal–organic frameworks (MOFs) have a unique set of properties.
Abednatanzi, Sara +4 more
core +1 more source
Molecules, 2000 A conformationally rigid polyheterocycle (3) which mimics the putative receptorbound conformation of dihydropyridine-type calcium channel modulators is prepared in a seven-step reaction sequence based on a Biginelli-type cyclocondensation reaction.
Birgit Jauk +2 more
doaj +1 more source
One-step synthesis of pyridines and dihydropyridines in a continuous flow microwave reactor [PDF]
, 2013 The Bohlmann–Rahtz pyridine synthesis and the Hantzsch dihydropyridine synthesis can be carried out in a microwave flow reactor or using a conductive heating flow platform for the continuous processing of material. In the Bohlmann–Rahtz reaction, the use
Bagley, Mark C +4 more
core +2 more sources
1,3-Dicarbonyl compounds in stereoselective domino and multicomponent reactions
, 2010 International audienceModern organic synthesis focuses on the discovery and the development of stereoselective multiple bond-forming transformations allowing the creation of several covalent bonds in a single operation.
Bonne, Damien +3 more
core +4 more sources