The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 1995
Filed:
Oct. 19, 1992
Tadafumi Terada, Honjo, JP;
Katsuhiko Fujimoto, Honjo, JP;
Junichi Yamashita, Honjo, JP;
Mitsugi Yasumoto, Honjo, JP;
Setsuo Takeda, Myozai, JP;
Junji Uchida, Tokushima, JP;
Konstanty Wierzba, Itano, JP;
Yuji Yamada, Tokushima, JP;
Taiho Pharmaceutical Co., Ltd., Tokyo, JP;
Abstract
This invention provides a 5-substituted uridine derivative of the formula ##STR1## wherein X is F or CF.sub.3, R.sub.1 and R.sub.2 each represent a group --OSi--(R.sub.4)(R.sub.5)(R.sub.6) (wherein R.sub.4, R.sub.5 and R.sub.6 represent C.sub.1 -C.sub.10 alkyl or the like), OH, aminoacyloxy group wherein the amino group may be substituted with lower alkyl group or carboxylalkylcarbonyloxy group, R.sub.3 is a group --OSi(R.sub.4)(R.sub.5)(R.sub.6), H, OH, aminoacyloxy group wherein the amino group may be substituted with lower alkyl group, or carboxylalkylcarbonyloxy group, and at least one of R.sub.1, R.sub.2 and R.sub.3 is a group --OSi--(R.sub.4)(R.sub.5)(R.sub.6), with the proviso that when X is fluorine atom, R.sub.3 is not hydrogen, and an intermediate for the preparation thereof, preparation processes of the derivative and anti-tumor agent containing the derivative as an active ingredient.