Moszner, Norbert; Lamparth, Iris; Angermann, Jörg; Fischer, Urs; Zeuner, Frank; Bock, Thorsten; Liska, Robert; Rheinberger, Volker (2010). Synthesis of bis(3-{[2-(allyloxy)ethoxy]methyl}-2,4,6-trimethylbenzoyl)(phenyl)phosphine oxide - a tailor-made photoinitiator for dental adhesives. Beilstein journal of organic chemistry, 6, p. 26. Frankfurt am Main: Beilstein-Institut 10.3762/bjoc.6.26
Full text not available from this repository. (Request a copy)Because of the poor solubility of the commercially available bisacylphosphine oxides in dental acidic aqueous primer formulations, bis(3-{[2-(allyloxy)ethoxy]methyl}-2,4,6-trimethylbenzoyl)(phenyl)phosphine oxide (WBAPO) was synthesized starting from 3-(chloromethyl)-2,4,6-trimethylbenzoic acid by the dichlorophosphine route. The substituent was introduced by etherification with 2-(allyloxy)ethanol. In the second step, 3-{[2-(allyloxy)ethoxy]methyl}-2,4,6-trimethylbenzoic acid was chlorinated. The formed acid chloride showed an unexpected low thermal stability. Its thermal rearrangement at 180 ° C resulted in a fast formation of 3-(chloromethyl)-2,4,6-trimethylbenzoic acid 2-(allyloxy)ethyl ester. In the third step, the acid chloride was reacted with phenylphosphine dilithium with the formation of bis(3-{[2-(allyloxy)ethoxy]methyl}-2,4,6-trimethylbenzoyl)(phenyl)phosphine, which was oxidized to WBAPO. The structure of WBAPO was confirmed by ¹H NMR, ¹³C NMR, ³¹P NMR, and IR spectroscopy, as well as elemental analysis. WBAPO, a yellow liquid, possesses improved solubility in polar solvents and shows UV-vis absorption, and a high photoreactivity comparable with the commercially available bisacylphosphine oxides. A sufficient storage stability was found in dental acidic aqueous primer formulations.
Item Type: |
Journal Article (Original Article) |
|---|---|
Division/Institute: |
04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Neurology |
UniBE Contributor: |
Fischer, Urs Martin |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
1860-5397 |
Publisher: |
Beilstein-Institut |
Language: |
English |
Submitter: |
Factscience Import |
Date Deposited: |
04 Oct 2013 14:14 |
Last Modified: |
02 Mar 2023 23:20 |
Publisher DOI: |
10.3762/bjoc.6.26 |
PubMed ID: |
20502649 |
Web of Science ID: |
000276238900001 |
URI: |
https://boris.unibe.ch/id/eprint/3354 (FactScience: 207015) |
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