89448-83-9Relevant articles and documents
MELANIN PRODUCTION INHIBITOR
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, (2011/10/13)
Disclosed is a melanin production inhibitor which has an excellent inhibitory activity on the production of melanin and is highly safe. The melanin production inhibitor comprises a compound represented by general formula (1) (excluding clotrimazole), and/or a pharmacologically acceptable salt thereof. In the formula, A1, A2 and A3 are independently selected from a hydrogen atom, an aryl group which may have a substituent, and an aromatic heterocyclic group which may have a substituent, wherein at least one of A1, A2 and A3 is selected from the aryl group and the aromatic heterocyclic group, the total number of carbon atoms contained in A1, A2 and A3 is 6 to 50 and, when at least two of A1, A2 and A3 represent the aryl groups or the aromatic heterocyclic groups, the adjacent two aryl or aromatic heterocyclic groups may be bound to each other via an alkyl chain or an alkenyl chain to form a ring; m represents an integer of 0 to 2; X represents a hetero atom, a hydrogen atom, or a carbon atom; R1 and R2 are independently selected from a hydrogen atom and an oxo group, wherein when one of R1 and R2 is an oxo group, the other is not present; and R3 is selected from a hydrogen atom, and a C1-8 hydrocarbon group in which one or some of hydrogen atoms or carbon atoms may be substituted by a hetero atom or hetero atoms, wherein the number of R3's present in the compound corresponds to the number of X's and, when two or more R3's are present, the R3's are independently present and the adjacent two R3's may be bound to each other to form, together with X, a ring, and the terminal of R3 may be bound to a carbon atom to which A1, A2 and A3 are bound, thereby forming a ring.
ORNITHINE DERIVATIVES AS PROSTAGLANDIN E2 AGONISTS OR ANTAGONISTS
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Page/Page column 123, (2010/02/12)
Ornithine derivatives of the formula (I): wherein X is -CO- or -(CH2) k- (wherein k is 1, 2 or 3); Y is Z-(CH2) n-, and the like; {wherein Z is R1-CO-NR4-, and the like, (wherein R1 is aryl, and the like; and R4 is hydrogen, or lower alkyl); and n is 1, 2, 3, 4, 5 or 6}; R2 is aryl-(lower alkyl), and the like; R3 is -Q-R7, [wherein Q is -CO- or -SO2-, R7 is heterocyclyl], and the like; and R5 and R6 are independently hydrogen or lower alkyl; or a pharmaceutically acceptable salt thereof, which are useful as medicament.
Pharmaceuticals
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, (2008/06/13)
The present invention provides compounds of formula (I) as well as the use of such compounds in pharmaceutical compositions and methods of treatment. The compounds described herein represent a class of TAFIla inhibitors suitable for use in treating condit
Simple syntheses of cyclic polyamines using selectively N-tritylated polyamines and succinic anhydride
Militsopoulou, Maria,Tsiakopoulos, Nikolaos,Chochos, Christos,Magoulas, George,Papaioannou, Dionissios
, p. 2593 - 2596 (2007/10/03)
Treatment of selectively N-tritylated spermidine and spermine derivatives with succinic anhydride, followed by PyBrOP-mediated intramolecular amide bond formation and LiAlH4 reduction, allows for an easy and general entry to cyclic polyamine derivatives.
Efficient synthesis of azetidine through N-trityl- or N- dimethoxytritylazetidines starting from 3-amino-1-propanol or 3- halopropylamine hydrohalides
Huszthy,Bradshaw,Krakowiak,Wang,Dalley
, p. 1197 - 1207 (2007/10/02)
Efficient synthetic routes for the preparation of azetidine starting from commercially available 3-amino-1-propanol or 3-halopropylamine hydrohalides are reported. First, the appropriate N-trityl- or N-dimethoxytrityl protected tosyloxy- or halopropylamines were prepared. These precursors were then cyclized into the N-trityl- or N-dimethoxytritylazetidines. The N-protecting groups were removed in the presence of perchloric acid giving the hydrogen perchlorate salt of azetidine. The latter compound was transformed into its free base using a strong base under anhydrous conditions. The relatively expensive 4,4'-dimethoxytrityl chloride and less expensive trityl chloride used in these synthetic procedures were recycled in good yields. Azetidine hydrogenperchlorate can be used to prepare N-substituted azetidines without the need to isolate the free azetidine.
