Metal complexes of pyrimidine-derived ligands. VII. Palladium(II), platinum(II) and rhodium(III) complexes with 3,5-dimethyl-1 -(4′, 6′-dimethyl-2′-pyrimidyl)pyrazole, a potential anti-cancer agent
Method For Inhibiting Melanin Production And Whitening Skin With Pyrimidlypyrazole Compounds Or Pharmaceutically Acceptable Salts Thereof
申请人:SHISEDIO COMPANY LTD.
公开号:US20130045173A1
公开(公告)日:2013-02-21
The present invention provides a compound having an excellent inhibitory action on melanin production and being useful as a whitening agent, and a skin external preparation containing the compound. The whitening agent of the present invention comprises, as an active ingredient, a compound represented by formula (1) or a pharmacologically acceptable salt thereof:
wherein, R
1
, R
3
, R
4
, and R
6
are each independently C
1-3
alkyl; and R
2
and R
5
are each independently a hydrogen atom or C
1-3
alkyl.
SKIN WHITENING AGENT AND EXTERNAL PREPARATION FOR THE SKIN
申请人:Shiseido Company, Ltd.
公开号:EP2250999A1
公开(公告)日:2010-11-17
The present invention provides a compound having an excellent inhibitory action on melanin production and being useful as a whitening agent, and a skin external preparation containing the compound. The whitening agent of the present invention comprises, as an active ingredient, a compound represented by formula (1) or a pharmacologicallyacceptable salt thereof:
wherein, R1, R3, R4, and R6 are each independently C1-3 alkyl; and R2 and R5 are each independently a hydrogen atom or C1-3 alkyl.
The present invention provides cosmetic use of a pyrimidylpyrazole compound represented by formula (1) or a pharmacologically acceptable salt thereof:
wherein, R1, R3, R4, and R6 are each independently C1-3 alkyl; and R2 and R5 are each independently a hydrogen atom or C1-3 alkyl.
Al-Ashmawy; Abd El-Samii; El Feky, Bollettino Chimico Farmaceutico, 1998, vol. 137, # 4, p. 110 - 114
作者:Al-Ashmawy、Abd El-Samii、El Feky、Osman
DOI:——
日期:——
Azide bridged dicopper(II), dicobalt(II) complexes and a rare double μ-chloride bridged ferromagnetic dicobalt(II) complex of a pyrazolyl-pyrimidine ligand: Synthesis, crystal structures, magnetic and DFT studies
作者:Atanu Jana、Saugata Konar、Kinsuk Das、Sangita Ray、James A. Golen、Arnold L. Rheingold、Luca M. Carrella、Eva Rentschler、Tapan Kumar Mondal、Susanta Kumar Kar
DOI:10.1016/j.poly.2012.03.010
日期:2012.5
Two new dinuclear copper(II) complexes [Cu-2(PymPz)(2)(N-3)(2)Cl-2] (1), [Cu-2(PymPz)(2)(N-3)(4)] (2) and two new dinuclear cobalt(II) complexes [Co-2(PymPz)(2)Cl-4] (3), [Co-2(PymPz)(2)(N-3)(4)] (4) [PymPz = 2-(3,5-dimethyl-1H-pyrazol-1-yl)-4,6-dimethylpyrimidine] have been synthesized and characterized crystallographically and spectroscopically. In each of the complexes 1,2 and 4 the two adjacent metal centers are bridged by a pair of mu-1,1 azide groups whereas in 3 the metal centers are bridged by a pair of chloride ions. In the complexes, all the metal centers are pentacoordinated. In 1 and 2 the copper(II) centers have distorted square pyramidal geometry (tau = 0.18 for 1 and 0.091 for 2) but in 3 and 4 cobalt(II) centers have distorted trigonal bipyramidal geometry (tau = 0.619 for 3 and 0.557 for 4). Complexes 1 and 2 show antiferromagnetic interaction (J = -7.09 cm(-1) for 1 and J = -17.00 cm(-1) for 2) whereas 3 and 4 show ferromagnetic interaction (J = 7.44 cm(-1) for 3 and J = 10.45 cm(-1) for 4). Complex 3 displays an unprecedented ferromagnetic interaction over double mu-chloro bridges in the observed angle range (94.87 degrees). The exchange path-ways parameters for all the complexes have also been evaluated from density functional theoretical calculations to corroborate the bridging signatures with experimental findings. (C) 2012 Elsevier Ltd. All rights reserved.