Abstract:
This invention relates to a compound useful for the treatment of tumors having formula (I), wherein R8, R6 and R10 are independently hydrogen, lower alkyl, aryl, lower alkanoyl, formyl, halogen, hydrazino, nitro, NR2R3, OR1, or SR1, methoxy, hydroxy, CO2H, SO2NR1R2, or CONR1R2; R1, R2 and R3 are independently hydrogen, lower alkyl, aryl lower alkyl, aryl, formyl or lower alkanoyl; R9, R11, R10 and R7 are independently hydrogen, or lower alkyl or R9 and R11 taken together with the carbon atoms to which they are attached form a phenyl group or R9 and R10 taken together with the carbon atoms to which they are attached form a phenyl group or R7 and R10 taken together with the carbon atoms to which they are attached form a phenyl group; A is (CR4R5)n3, lower cycloalkyl or aryl or a chemical bond; each R4 and R5 are independently hydrogen or lower alkyl; R12 and R13 are independently hydrogen, or lower alkyl which is unsubstituted or substituted with hydroxy, mercapto, lower alkoxy, lower alkylcarbonyloxy, carboxy, or carbloweralkoxy or R12 and R13 taken together with the nitrogen to which they are attached form a 3-6-membered heterocyclic ring; D is a chemical bond or taken together with NR12 forms a 5 or 6-membered heterocyclic ring; n1 and n2 are independently 0, 1 or 2; and n3 is 0, 1, 2, 3, 4 or 5.
Abstract:
The invention relates to polymers which exhibit excellent electronic, optical and mechanical properties. The invention more particularly relates to polymers of the polyquinoline and polyanthrazoline class which are useful in electronic, optoelectronic and photonic applications. The invention further relates to a method of solubilizing polymers of the invention and polyquinolines and polyanthrazolines in general, using a complexing agent of a Lewis acid, a dialkyl phosphate, a diaryl phosphate or mixtures thereof.
Abstract:
A protective monolayer is formed on e.g. silica gel and glass surfaces comprising a monolayer of silicon and oxygen atoms which is substituted with first and second hydrocarbyl substituents.
Abstract:
Carbon clusters, such as C60 and C70 fullerenes are separated by means of a recognition selector having formula (I), wherein R1 is (a), wherein R2 is O, S or NR12 wherein R12 is independently hydrogen or P=O with the proviso that when R12 is P=O, then only one such group is present and all R2's are additionally bonded to R12, R4 is independently O, S or NH, R3 and R5 are each independently hydrogen or lower alkyl, n and o are each independently zero, 1, 2, or 3, p, q, r, s and t are each independently zero or 1, Ar is a monocyclic or ortho-fused polycyclic aromatic moiety having up to 10 carbon atoms, either of which may be unsubstituted or substituted with one or more lower alkyl, NO2, N(R6)3 , CN, COOR7, SO3H, COR8 and OR9 wherein R6, R7, R8 and R9 are each independently hydrogen or lower alkyl; W is H or CH=CH2; and m is 1 to 10.
Abstract:
The invention relates to a compound having formula (A) or pharmaceutically acceptable salts thereof, wherein one of R1 and R2 is a heteroatom fatty acid acyl group having 13-14 carbon atoms in the principal chain and up to a total of 18 carbon atoms, while the other is hydrogen, a heteroatom of fatty acid acyl group containing 13-14 carbon atoms in the principal chain and up to a total of 18 carbon atoms or an acyl group of a fatty acid containing 4-26 carbon atoms in the principal chain and up to a total of 30 carbon atoms and R is a naturally occurring polar group characteristic of a glycerolphospholipid isolated from endogenous sources. This invention also relates to the use of the compounds of the present invention for inhibiting retrovirus infections and for the treatment of AIDS or AIDS related diseases.
Abstract:
Chiral catalysts for enantioselectively epoxidizing a prochiral olefin and for enantioselectively oxidizing a prochiral sulfide are disclosed, together with methods of using such catalysts. In accordance with one aspect of the invention, the catalyst is a salen derivative which has general structure (I). In accordance with another aspect of the present invention is a method of producing an epoxychroman using a chiral catalyst. In accordance with this method, a chromene derivative, an oxygen atom source, and a chiral catalyst are reacted under such conditions and for such time as is needed to epoxidize said chromene derivative. In accordance with yet another aspect of this invention is a method of enantioselectively epoxidizing a cis-cinnamate derivative to make taxol or an analog thereof. In accordance with another aspect a method of disproportionation of hydrogen peroxide using the catalysts of the present invention is disclosed.
Abstract:
A water disinfection system is disclosed. The system comprises a permanganate in a concentration of up to about 15 mg/L, copper ions in a concentration of up to about 900 νg/L, and silver ions in a concentration of up to about 90 νg/L. In addition, a method for disinfecting water utilizing this system is described.
Abstract:
The present invention is directed a method of using certain hydrophobic peptides for the inhibition of cell proliferation, wherein the peptides have the general formula: R-Xaa1-(Xaa)m-Xaac. The subject peptides have 2-7 amino acids such as alanine (Ala), arginine (Arg), cysteine (Cys), isoleucine (Ile), leucine (Leu), lysine (Lys), methionine (Met), norleucine (nLeu), phenylalanine (Phe), proline (Pro), threonine (Thr), tyrosine (Tyr), tryptophan (Trp), or valine (Val). In accordance with the present invention, these peptides are potent inhibitors of cell proliferation as well as inhibitors of the synthesis of two cellular proto-oncogenes. One aspect of the present invention provides for the prevention and treatment of cancer by administration of the subject peptides. A further aspect of the present invention provides for inhibiting cell proliferation using the subject peptides in the treatment and prevention of prostatic hypertrophy, arterial occlusion (restenosis), arteriosclerosis, and smooth muscle cell diseases.
Abstract:
A method of and system for rendering a halftone image of a gray scale image (500) by utilizing a pixel-by-pixel comparison (402) of the gray scale image against a blue noise mask (502) is disclosed in which the gray scale image is scanned on a pixel-by-pixel basis and compared on a pixel-by-pixel basis to an array of corresponding data points contained in a blue noise mask stored in a PROM (406) or computer memory in order to produce the desired halftoned image. Both digital and optically implemented halftone methods are disclosed. Application specific modifications of the blue noise mask as well as its use for producing hafltoned color images are also disclosed.