POLYADDITION OF 3,4-DIHYDRO-2,5-DIMETHYL-2H-PYRAN-2-CARBALDEHYDE BY METAL-COMPLEXES

Authors
MASLINSKASOLICH J MACIONGA A TURCZYN R
Citation
J. Maslinskasolich et al., POLYADDITION OF 3,4-DIHYDRO-2,5-DIMETHYL-2H-PYRAN-2-CARBALDEHYDE BY METAL-COMPLEXES, Reactive & functional polymers, 26(1-3), 1995, pp. 35-41
Citations number
6
Categorie Soggetti
Polymer Sciences","Engineering, Chemical","Chemistry Applied
Journal title
Reactive & functional polymers → ACNP
ISSN journal
13815148
Volume
26
Issue
1-3
Year of publication
1995
Pages
35 - 41
Database
ISI
SICI code
1381-5148(1995)26:1-3<35:PO3BM>2.0.ZU;2-Y
Abstract
The 3,4-dihydro-2,5-dimethyl-2H-pyran-2-carbaldehyde (methacrolein dim er) 1 was oxidized at 20-60 degrees C with air in the presence of poly meric Mn(II), Co(II) and Cu(II) complexes. The 3,4-dihydro-2,5-dimethy l-2H-pyran-2-carboxylic acid 2 formed at the first stage of oxidation undergoes self condensation with 1 to a monoester of hemiacetal 3. Gra dual addition of hydroxyl groups of 3 to the vinyl-ether groups of 3 r esulted in the formation of a mixture of cyclic oligo(acetal-esters) 5 (14-, 21- and 28-membered rings).