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Title:
THIAZOLE SIMULANT COMPOUND AND SKIN LOTION
Document Type and Number:
Japanese Patent JP3255902
Kind Code:
B2
Abstract:

PROBLEM TO BE SOLVED: To obtain a new thiazole simulant compound inhibiting tyrosinase activity which has strong influence on biosynthesis of melanin, and useful as bleaching cosmetics.
SOLUTION: This new compound is expressed by formula I {wherein a ring X is a compound of formula II (wherein R1 is H, a halogen, a lower alkyl or the like) or III (wherein R2 is H, a halogen, a lower alkyl or the like); Y is a cyclic amino or is expressed by formula IV [wherein (n) is 1 to 5; R3 is expressed by formula V (wherein R4 and R5 are each H or a lower alkyl)]}, and is e.g. D [4-(2-benzothiazolylthio)butoxy]phenylacetic acid. The compound of formula I is obtained e.g. by treating 2-mercaptobenzothiazole with an alkali metal base (e.g. sodium hydride, etc.), in an inactive solvent (e.g. dimethylformamide, etc.), and then by reaction with p-(4-bromobutoxy) phenylacetic acid.


Inventors:
Masaru Saida
Toshitaka Inoue
Yoshihiro Tagami
Koichi Beppu
Yuji Shimozono
Mizue Mukae
Shigeo Ohta
Application Number:
JP2000182344A
Publication Date:
February 12, 2002
Filing Date:
February 17, 1992
Export Citation:
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Assignee:
Hisamitsu Pharmaceutical Co., Ltd.
International Classes:
C07D277/74; A61K8/00; A61K8/49; A61K31/428; A61K31/454; A61P17/00; A61P43/00; A61Q19/00; A61Q19/02; C07D277/60; C07D277/82; (IPC1-7): C07D277/74; A61K7/00; A61K7/48; A61K31/428; A61K31/454; A61P17/00; A61P43/00; C07D277/82
Other References:
CLAUDE,S.,et al.,Study of Electron−Impact Fragmentation of Benzothiazole Derivatives,HELV.CHIM ACTA,63(3),pp.682−692(1980)
LUK’YANOV,A.V.,et al.,Heterocyclic quinones.XII.2,4−Bis(dialkylamino)benzothiazolequionones,Khim.Geterotsikl.Soedin.,7(2),pp.196−200(1971)
MATSUMOTO,K.,et al., Acylic Tertiary Amines as Nucleophiles in Substitution Reactions of Aromatic and Heteroaromatic Halides,J.CHEM.SOC.,CHEM.SOMMUN.,(5)pp.306−307(1991)
RUDZIT,E.A.,et al.,Antimicrobial action of benzothiazoloquinones,Farmakol.Tolsikol.,34(3),pp.350−352(1971)
Attorney, Agent or Firm:
Murayama Midori (1 person outside)