Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1985-06-26
1986-04-15
Daus, Donald G.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
549 26, 549388, C07D49500, C07D51700
Patent
active
045826412
ABSTRACT:
Compounds of the formula ##STR1## wherein R.sup.1 -R.sup.4 is hydrogen or chlorine, R.sup.5 is --COOMe or --SO.sub.3 Me, Me is an alkali metal cation and X is oxygen, sulfur or selenium,
photosensitizers for the conversion of tachysterol into previtamin D are described. The tachysterol content in mixtures of previtamin D and tachysterol can be greatly reduced by UV-irradiation in the presence of such photosensitizers.
REFERENCES:
patent: 1532790 (1925-04-01), Weiler
patent: 2157351 (1939-05-01), Schneider et al.
patent: 3539590 (1970-11-01), Oftedahl
J.C. S. Chem. Comm. "Photolytic Production of Vitamin D, The Preparative Value of a Photo-Sensitiser", S. Eyley, D. Williams, p. 858 (1975).
Nouveau Journal de Chimie, "Photosensitized Isomerization of Previtamin D.sub.2 and Tachysterol and the Related 1,2-Bis-(1-Cyclopentenyl) Ethylene: Torsional Potential Curves of Triene Triplets", M. Denny, R. Liu, vol. 2, No. 6, pp. 637-641.
Hansen Hans-Jurgen
Pfoertner Karlheinz
Daus Donald G.
Hoffmann-La Roche Inc.
Isgro William G.
Leon Bernard S.
Saxe Jon S.
LandOfFree
Compounds of o-(6-hydroxy-3-oxo-3H-thio(seleno)xanthen-9-yl)benz does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compounds of o-(6-hydroxy-3-oxo-3H-thio(seleno)xanthen-9-yl)benz, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compounds of o-(6-hydroxy-3-oxo-3H-thio(seleno)xanthen-9-yl)benz will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1437589