Abstract:
The present invention provides an improved process for the preparation of highly pure bexarotene of formula (I). The present invention also provides impurities of bexarotene, method of isolation and identification of these impurities, and use of these impurities as reference marker as well as reference standard.
Abstract:
The present application relates to perfume raw materials, perfume delivery systems and consumer products comprising such perfume raw materials and/or such perfume delivery systems, as well as processes for making and using such perfume raw materials, perfume delivery systems and consumer products. Such perfume raw materials and compositions, including the delivery systems, disclosed herein expand the perfume communities options as such perfume raw materials can provide variations on character and such compositions can provide desired odor profiles.
Abstract:
Die vorliegende Erfindung betrifft die Verbindungen gemäß Formel (1) bis (8) und deren Verwendung in organischen Elektrolumineszenz- vorrichtungen, insbesondere in blau emittierenden Vorrichtungen. Die Verbindungen gemäß Formel (1) bis (8) werden als Hostmaterial oder Dotand in der emittierenden Schicht oder auch in einer Loch- oder Elektronentransportschicht verwendet.
Abstract:
Poly(bis-9,9'-fluorenes) are disclosed with identical or different recurring structural elements of formula (I), in which the two R1 groups independently of one another stand for H, C1-C18-alkyl, C6-C14-aryl, C7-C15-aralkyl, C1-C18-alkoxy, R2-(O-CnH2n)m-O-, C1-C18 alkylthio, C1-C18-dialkylamino, -C(O)OH, -C(O)O-C1-C18-alkyl, -C(O)-N(C1-C18-alkyl)2, SO3H, -SO3-C1-C18-alkyl, -SO2-N(C1-C18-alkyl)2, C1-C17-alkyl-C(O)-O- or C1-C17-alkyl-C(O)-, R2 stands for H or C1-C12-alkyl, n is a number between 2 and 6 and m is a number between 1 and 12. The polymers can be used on their own or mixed with at least one additional fluorophore whose absorption band overlaps with the emission band (fluorescence emission) of the polymer of formula (I), as an active radiating layer for light-emitting diodes, screens and display elements.
Abstract:
A process for preparing a compound of formula (I), where R , R , R , R , R and R are independently hydrogen or C1-6 alkyl; R is halogen, cyano, NO2, C1-4 alkyl, C1-4 haloalkyl, C1-4 alkoxy or RaS in which Ra is C1-4 alkyl; R , R and R independently are hydrogen, halogen, C1-4 alkyl, C1-4 alkoxy, C1-4 haloalkyl, C1-4 haloalkoxy, CN, NO2, phenoxy or substituted phenoxy; RbS(O)n Om in which m is 0 or 1, n is 0, 1 or 2 and Rb is C1-4 alkyl, C1-4 haloalkyl, phenyl or benzyl, NHCORc in which Rc is C1-4 alkyl, NRdRe in which Rd and Re independently are hydrogen or C1-4 alkyl; RfC(O)- in which Rf is hydrogen, C1-4 alkyl, C1-4 haloalkyl or C1-4 alkoxy; SO2NRgRh in which Rg and Rh independently are hydrogen or C1-4 alkyl; or any two of R , R and R together with the carbon atoms to which they are attached form a 5 or 6 membered heterocyclic ring containing up to three heteroatoms selected from O, N or S and which may be optionally substituted by C1-4 alkyl, C1-4 haloalkyl, C1-4 alkoxy, =NOC1-4 alkyl, or halogen; which process comprises the rearrangement of a compound of formula (II), where R , R , R , R , R , R , R , R , R and R are as defined in relation to formula (I), in the presence of a base and a polar aprotic solvent characterised in that the process is carried out in a reaction medium substantially free of hydrogen cyanide or cyanide anion.
Abstract:
The present invention relates to therapeutically active heterocyclic compounds of formula (I), wherein n is 0, 1 or 2; and X is -O-, -S, -N(R )- or -CH2-; and R is H, NH2, NHR or OH; and R and R independently are H, COOH; COOR , CONH2, CONHR , CON(R )2, CONHSO2R or tetrazole; and R is H, OH, NH2, NHR ; CF3, C1-8-alkyl, C2-8-alkenyl, C2-8-alkynyl, C3-6-cycloalkyl, phenyl or C1-4-alkoxy; and R is H, C1-8-alkyl, C2-8-alkenyl, C2-8-alkynyl, phenyl or C3-6-cycloalkyl; and ring A can be partly or completely saturated or aromatic, or a salt thereof with a pharmaceutically acceptable acid or base, a method of preparing the same and to pharmaceutical compositions comprising the compounds. The novel compounds are useful in treating diseases in the central nervous system related to the metabotropic glutamate receptor system.
Abstract:
Disclosed are novel classes of anti-androgens including dihydrophenanthrene derivatives, their method of synthesis and their use in treating disorders associated with excessive androgenic activities.
Abstract:
Compounds having formula (I): R1-(Ao)k-(Z1-A1)m-Zo-(E)n-(Q)o-(Z2-A2)p-R2, can be easily produced in high yields from organic zinc compounds having formula (II): R1-(Ao)k-(Z1-A1)m-Zo-ZnY and compounds having formula (III): X-(E)n-(Q)o-(Z2-A2)p-R2, in which Ao, A1, A2, E, R1, R2, Zo, Z1, Z2, Q, k, m, n, o and p have the given meaning.
Abstract:
Cyclohexane derivatives of formula R -A -Z -A -R in which R and R are in each case an alkyl group with 1-10 C atoms, in which also one or two non neighboring CH2 groups can be replaced by O atoms and/or -CO- groups and/or -CO-O- groups and/or -CH=CH- groups, one of the remainder R and R , also H, F, Cl, Br, CN or R -A -Z -, A is -A-, A -A- or -A-A -, A is a substituted trans-1,4-cyclohexyl group substituted in 2 , 3 , 5 and/or 6 position, substituted once or substituted several times by F and/or Cl and/or Br and/or CN and/or an alkyl group or a fluoridated alkyl group, each with 1-10 atoms, in which also one or two not neighboring CH2 groups can be replaced by O atoms and/or -CO- groups and/or -CO-O- groups; which also, as the case may be, can be substituted in 1 and/or 4 position, A , A and A are in each case an unsubstituted 1,4-phenylene, or a 1,4-phenyl substituted by one or two F and/or Cl atoms and/or CH3 groups and/or CN groups, in which also one or two CH groups can be replaced by N atoms and/or NO, 1,4-cyclohexylene, in which one or two not neighboring CH2 groups may be substituted by O atoms, 1,3-dithiane-2,5-diyl, piperidine-1,4-diyl, 1,4-bicyclo(2,2,2)-octylene-, decahydronaphthalene-2,6-diyl-, or 1,2,3,4-tetrahydronaphthalene-2,6-diyl groups, Z and Z are either -CO-O-, -O-CO-, -CH2CH2-, OCH2-, -CH2O or a single link, and R is H, an alkyl group with 1-10, in which also one or two not-neighboring CH2 groups can be replaced by O atoms and/or -CO- groups and/or -CO-O- groups and/or -CH=CH- groups; F, Cl,Br or CN, it being understood that if Z = -CO-O- A in beta -position, to the -CO-O- bridge it carries no equatorial substitutes, are suitable as components for liquid crystal phases.
Abstract:
An indane, tetralin or phenyl alcohol is made by a heterogeneous, fast, exothermic Friedel Craft reaction and the reaction mixture is cooled to a temperature at which substantial by-product formation is avoided by continuously utilising the heat of reaction to boil solvent from the reaction mixture. The reaction mixture is generally maintained below atmospheric pressure, typically 20 to 100 mm Hg. The process is of particular value for the production of aryl alcohols by reacting an indane or tetralin with ethylene oxide or propylene oxide.