Journal
TETRAHEDRON LETTERS
Volume 50, Issue 8, Pages 873-875Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2008.12.015
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Funding
- Fonds der Chemischen Industrie
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4,5-Bis(1,2:3,4-di-O-isopropylidene-alpha-D-galactopyranos-6-yl)phthalonitrile (3) was prepared by SNAr reaction of diacetone galactose I and 4,5-difluorophthalonitrile (2) in 96% yield. Cyclotetramerization of 3 was achieved via its isoindoline derivative 4, affording the peripherally octasubstituted galactose zinc(II) phthalocyanine 5 in 29% yield. Deprotection of 5 gave the highly water soluble octasubstituted galactose zinc(II) phthalocyanine 6 in 81% yield which will be applied as a photosensitizer in photodynamic therapy. (C) 2008 Elsevier Ltd. All rights reserved.
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