摘要:
The invention provides a process for the preparation of a compound of the general formula (I): ##STR1## wherein X, Y and R.sup.1 to R.sup.7 are as defined. In the process, the olefinic analog of the compound of general formula (I) is treated with a halogen-bearing compound in the presence of metallic zinc.
摘要:
Substituted aryl or heteroaryl in particular benzoyl bicycloalkanediones and related compounds, intermediates therefor, synthesis thereof, and the use of said diones for the control of weeds.
摘要:
A composition of matter having the general structure: ##STR1## (wherein X is F, Cl, or NO.sub.2, and Y is CO, SO.sub.2 or C(CF.sub.3).sub.2) is employed to terminate a nucleophilic reagent, resulting in the exclusive production of phenylethynyl terminated reactive oligomers which display unique thermal characteristics. A reactive diluent having the general structure: ##STR2## (wherein R is any aliphatic or aromatic moiety) is employed to decrease the melt viscosity of a phenylethynyl terminated reactive oligomer and to subsequently react therewith to provide a thermosetting material of enhanced density. These materials have features which make them attractive candidates for use as composite matrices and adhesives.
摘要:
Acylaromatic compounds are prepared from aromatic compounds and carboxylic acids by reacting the starting compounds with phosgene in the presence of an aliphatic phosphine oxide or of an N,N-dialkylformamide and of an Fe(II), Fe(III) or Zn(II) compound.
摘要:
The title compounds can be prepared by reaction of a styrene derivative with ethylene in the presence of a nickel catalyst which carries a phosphorus-oxygen chelate ligand, at a temperature of 20.degree. to 160.degree. C. and an ethylene pressure of 1 to 200 bar. Styrene derivatives extended with ethylene, of the formula ##STR1## in which R.sup.19 denotes hydrogen, C.sub.1 -C.sub.4 -alkyl, vinyl or chlorine and R.sup.38 denotes C.sub.1 -C.sub.4 -alkenyl, C.sub.2 -C.sub.7 -acyl, flourine, chlorine or bromine andm assumes values of 4-104,with the exception of compounds wherein R.sup.19 denotes hydrogen and R.sup.38 denotes i-butyl or benzoyl, and m assumes the value 4, are new.
摘要:
The invention relates to benzylindane phospholipase A.sub.2 inhibitors, pharmaceutical compositions containing them, and methods of treating phospholipase A.sub.2 -mediated conditions in mammals by administration of a therapeutically effective amount of such a benzylindane phospholipase A.sub.2 inhibitor including the representative example: ##STR1##
摘要:
A new class of polymers is provided as well as the monomers used for their preparation. The polymers provided in accordance with practice of the present invention include repeating units comprising one or more quinoline groups, wherein at least a portion of the repeating units includes a hexafluoroisopropylidene (6F) group or a 1-aryl-2,2,2-trifluoroethylidene (3F) group, or both.The hexafluoroisopropylidene group is referred to herein as a "6F" group and has the following structure: ##STR1## The "6F" group includes a tetravalent carbon atom bound to two trifluoromethyl moieties with its other two bonds forming linkages in the polymer chain.the 1-aryl-2,2,2-trifluoroethylidene group is referred to herein as "3F" group and has the following structure: ##STR2## wherein Ar' is an aryl group. The "3F" group comprises a tetravalent carbon atom bound to one trifluoromethyl moiety and one aryl group with its other two bonds forming linkages in the polymer chain.
摘要:
The present invention discloses the antimicrobial utility of certain iodonium ylide compounds. The particular iodonium ylide compounds are phenyl iodonium ylides having an ortho substituent that stabilizes the positive charge on the polyvalent iodine by a nonbonded electrostatic interaction. The polyvalent iodine is further stabilized by a cyclic 1,3-dicarbonyl anion.
摘要:
A compound of formula (I): ##STR1## or a salt, enamine or the like, acylate, sulphonate, carbamate or ether derivative thereof; wherein X, X.sup.1 and X.sup.2 are independently oxygen or sulphur, R.sup.1 is an optionally substituted heterocyclic or cycloalkyl group, and Y is an optionally substituted C.sub.2 -C.sub.4 alkylene group which is optionally interposed by an oxygen atom, a group>S(O).sub.pa group ##STR2## or an optionally mono-substituted nitrogen atom, wherein p is O, 1 or 2, s is 0.sub.1 or 1 and R.sup.b is alkyl or alkoxy; provided that when X, X.sup.1 and X.sup.2 are oxygen, R.sup.1 is not pyridyl or pyrimidinyl. Processes for the preparation of these compounds and herbicidal compositions containing them are also described and claimed.
摘要:
Certain 2-naphthyl ketones are used as inhibitors of cholesterol esterase and function as hypolipidemic and hypocaloric agents. The invention also relates to a method of decreasing the absorption of dietary cholesterol and fats through the wall of the intestinal tract.