Search results for "Strong acids"

showing 2 items of 2 documents

Block and graft copolymers of 2-oxazolines

1994

The cationic ring-opening polymerization of 2-oxazolines is known to be initiated by alkyl halides, Lewis acids and esters of strong acids. The polymerization proceeds by a living mechanism. Numerous block and graft copolymers have already been described. Recently it was found that chloroformates (R-O-CO-CI) are also useful initiators. The mechanism of the initiation and propagation is discussed. This type of initiators allows the synthesis of different novel two-block and three-block copolymers, star-shape polymers, and a graft copolymer with a polyvinylacetate backbone.

chemistry.chemical_classificationMaterials sciencePolymers and PlasticsStrong acidsOrganic ChemistryCationic polymerizationPolymerCondensed Matter PhysicsBlock (periodic table)chemistryPolymerizationPolymer chemistryMaterials ChemistryCopolymerLewis acids and basesAlkylMacromolecular Symposia
researchProduct

The chemistry of [1,2,3]triazolo[1,5- c ]pyrimidine

2001

Abstract Reactions of [1,2,3]triazolo[1,5-c]pyrimidine 2 with some electrophiles and nucleophiles are reported. Triazole ring opening and loss of nitrogen is the principal reaction with electrophiles. With strong acids protonation on N6 competes successfully. Derivatives in which the pyrimidine ring has been opened are obtained in reactions with nucleophiles. No stable simple substitution compounds were found.

chemistry.chemical_compoundNucleophilechemistryPyrimidineStrong acidsStereochemistryOrganic ChemistryDrug DiscoveryElectrophileTriazoleProtonationRing (chemistry)BiochemistryTetrahedron
researchProduct