Chemistry: electrical and wave energy – Processes and products – Processes of treating materials by wave energy
Reexamination Certificate
2005-06-07
2005-06-07
Wong, Edna (Department: 1753)
Chemistry: electrical and wave energy
Processes and products
Processes of treating materials by wave energy
Reexamination Certificate
active
06902654
ABSTRACT:
A process for preparing a vitamin D derivative including providing an ultraviolet irradiation apparatus for photochemical reactions, which has an ultraviolet radiation-emitting lamp, an optical system which receives light from the ultraviolet radiation-emitting lamp and emits ultraviolet rays having a specific wavelength, and a quartz rod which receives the ultraviolet rays having the specific wavelength from the optical system and emits the ultraviolet rays, irradiating a solution of a provitamin D derivative with the ultraviolet rays emitted from the quartz rod to cause a photochemical reaction to the provitamin D derivative solution, thereby forming a previtamin D derivative, and subjecting the previtamin D derivative to a thermal isomerization reaction to prepare the vitamin D derivative.
REFERENCES:
patent: 3638312 (1972-02-01), Szwarc et al.
patent: 4055769 (1977-10-01), Sander
patent: 4702994 (1987-10-01), Rendulic et al.
patent: 5374405 (1994-12-01), Firnberg et al.
patent: 5516970 (1996-05-01), Miller et al.
patent: 5748288 (1998-05-01), Nagano et al.
patent: 5906429 (1999-05-01), Mori et al.
patent: 249864 (1947-07-01), None
patent: 855397 (1953-01-01), None
patent: 40 14 363 (1991-11-01), None
patent: 0967202 (1999-12-01), None
patent: 49-14541 (1974-02-01), None
patent: 61-176227 (1986-11-01), None
patent: 63-58203 (1988-04-01), None
patent: 2-3695 (1990-01-01), None
patent: 3-60733 (1991-03-01), None
patent: 3-188061 (1991-08-01), None
patent: 3-284346 (1991-12-01), None
patent: 3-288540 (1991-12-01), None
patent: 4-89473 (1992-03-01), None
patent: 4-89474 (1992-03-01), None
patent: 4-89475 (1992-03-01), None
patent: 4-89476 (1992-03-01), None
patent: 6-72994 (1994-03-01), None
patent: 6-80626 (1994-03-01), None
patent: 8-332372 (1996-12-01), None
patent: 10-72432 (1998-03-01), None
patent: WO 99/39132 (1999-08-01), None
Sato et al., “Effect of Wavelength on the Formation of 1 alpha-Hydroxyprevitamin D3 in the Ultraviolet Irradiation of Cholesta-5,7-Diene-1 alpha, 3 beta-Diol and the Use of a Filter Solution in the Photochemical Reaction in the Synthesis of 1 alpha-Hydroxyvitamin D3”, J. Nutr. Sci. Vitaminol. vol. 26, No. 6, pp. 545-555, no month, 1980.
V. Malatesta, et al., J. Am. Chem. Soc., vol. 103, pp. 6781-6783, “Laser Photochemical Production of Vitamin D”; 1981, no month.
Masami Okabe, et al., J. Org. Chem., vol. 60, No. 3, pp. 767-771, “Synthesis of 25-Hydroxycholecalcifer-16-en-23-ynol: A Potential Antipsoriatic Agent”, 1995, no month.
Tadashi Sato, et al., J. Nutr. Sci. Vitaminol., vol. 26, no. 6, pp. 545-555, “Effect of Wavelength on the Formation of 1α-Hydroxyprevitamin D, in the Ultraviolet Irradiation of Cholesta-5, 7-Diene-1α, 3β-Diol and use of a Filter Solution in the Photochemical Reaction in the Synthesis of 1α-Hydroxy-Vitamin D3”, 1980, no month.
William G. Dauben, et al., J . . . Am. Chem. Soc., vol. 104, pp. 5780-5781, “Effects of Wavelength on the Photochemistry of Provitamin D3”, 1982, no month.
William G. Dauben, et al., J. Am. Chem. Soc., vol. 110, No. 8, pp. 2548-2553, “Triene Photophysics and Photochemistry: Previtamin D3”, 1988, no month.
J.A. Keverling Buisman, et al., Journal of Pharmaceutical Sciences, vol. 57, No. 8, pp. 1326-1329, “Evaluation of the Effect of Isomerization on the Chemical and Biological Assay of Vitamin D”, Aug. 1968.
Katoh Masahiro
Michishita Tadao
Mikami Tetsuhiro
Oikawa Koji
Tsuzaki Kaname
Chugai Seiyaku Kabushiki Kaisha
Wong Edna
LandOfFree
Ultraviolet irradiation apparatus for photochemical reaction... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultraviolet irradiation apparatus for photochemical reaction..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultraviolet irradiation apparatus for photochemical reaction... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3511540