Novel phenylcyclohexanes of formula (I) in which: L<1> and L<2> are CH3 or one of the residues L<1> and L<2> may also be C2H5 or L<1>L<2>CH- is also (a), (b), (c), or (d), where R is H or straight-chained lower alkyl with up to 5 C atoms; n is 0 to 5; Q is -O- or CH2-; A is trans-1,4-cyclohexylene, 1,4-phenylene, 3-fluoro-1,4-phenylene or a single bond; X is F, Cl, -CF3, -CN, -OCF3 or -OCHF2; and ...

Disclosed are difluorobenzonitriles of formula (I), in which Y is alkyl, alkenyl, alkoxy, oxaalkyl or alkenyloxy with 1-12 C-atoms and Q is a residue selected from the following: (a), (b), (c), (d), (e), (f), (g), (h), (i), (j) and (k), which are suitable for use as components of liquid-crystal media.

Block phenolic oligomers of formula (I) may be reacted alone or with selected phenolic monomers during or after the formation of a phenolic novolak resin thereby said resin having at least one unit of formula (II), wherein X is from 2-7; wherein R is hydrogen, a lower alkyl or lower alkoxy group having 1-4 carbon atoms or a halogen group; and wherein R1 and R2 are individually selected from a hydr...

This invention is directed to a process for the isomerization of alk-2-enyl ethers to the corresponding alk-1-enyl ethers under anhydrous conditions by the use of a supported rare metal catalyst atomic number 44 or 45 which comprises contacting the allyl ether with between about 0.1 and about 20 wt. % of said supported catalyst in which the amount of rare metal with respect to support is between a...

1. Fluorobenzene derivatives of formula (I) in which R is H, an alkyl or alkenyl radical having 1 to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, it also being possible for one or more CH2 groups in these radicals to be replaced, in each case independently of one another, by -O-, -S-, -CO-, -CO-O-, -O-CO- or -O-CO-O- in suc...

Intermediates of the structural formula II, III, IV, VIII, XI, or XII, wherein said compound has an asymmetric center(s) as indicated by the single asterisk (*) and the double asterisk (**) and wherein the compound is substantially free from compound(s) having the same chemical structure but having other absolute stereochemical configurations at the asterisked carbon centers: or a pharmace...

A process for preparing a chiral carboxylic acid or ester thereof, either as a single enantiomer or as a mixture of enantiomers in which the presence of one enantiomer is enhanced relative to the others comprises reacting a prochiral olefinic function and either water or an alcoholic function with carbon monoxide in the presence of a protonic acid other than nitric acid, a single enantiomer of an ...

Optical resolution of (+/-)-1-methyl-3-phenylpropylamine can be conducted by using an optically active compound represented by formula (I), wherein n is 0 to 3 and R<1> represents hydrogen. A compound wherein n is 2 or 3 and R<1> represents hydrogen or C1 to C3 alkyl is new.

D 8663 - 16 Process for the preparation of alkali metal salts of ether-carboxylic acids A process for the preparation of alkali metal salts of ether-carboxylic acids by oxidation of etheralcohols in an aqueous phase with oxygen or gases containing oxygen at elevated temperatures in the presence of alkali metal hydroxides and noble metal catalysts, in which an aqueous solution, containing an alkali...

Salt-free esters of fatty acids with oligoglycerins or with addition reaction products of ethylene oxide and/or propylene oxide with oligoglycerins can be prepared by condensation of glycerin in the presence of basic alkaline earth compounds as the catalyst at temperatures between 200 and 280 DEG C, possibly subsequent reaction of the oligoglycerins obtained with ethylene oxide and/or propylene o...

A nonlinear optical element comprising 3-methyl-4-methoxy-4'-nitrostilbene useful for nonlinear optical and electro-optic effects.

Optically active or racemic compounds are provided having formula (I), where R2, R3 and R4 are each selected from the group consisting of H and OA with the provision that at least one of R2, R3 and R4 is H, A is H or is selected from the group consisting of hydrocarbyl radicals, for example lower alkyl radicals, optionally substituted with aromatic residues, (a), (b), and (c), R5 is selected from ...

4-[(2-chloroethyl)-(2-hydroxyethyl)-amino]benzoyl amino acids of formula (IV), wherein X represents a group (a), where P represents hydrogen or a straight or branched chain C1-6 alkyl group, and salts thereof, and processes for their production. The compounds are useful for the production of nitrogen mustard prodrugs.

The invention describes a process for producing short-chain alkane sulphonic acids and/or their salts by the addition of hydrogen sulphite to olefines in the presence of a radical starter. The novel process is characterized in that, to obtain largely sulphate and chloride-free alkane sulphonic acids, the corresponding olefine component is brought together with the aqueous hydrogen sulphite solutio...

2065293 9103462 PCTABS00003 The invention concerns a method of preparing high-purity 4,4'-dihydroxydiphenylsulphone in high yields by reacting phenol with a sulphonating agent in a chorinated aromatic compound. The phenol is reacted with the sulphonating agent in ortho-, meta- or para-chlorotoluene, or any mixture of these isomeric chlorotoluenes, as inert solvent at temperatures of about 100 to a...

A method for the preparation of a pyridazinone derivative having general formula (I), where: R<1> is a phenyl group, optionally substituted, R<2> is H, alkyl or carboxy, R<3> is H, alkyl or alkoxy and R<4> is alkyl; said method comprising reacting a hydrazone of glyoxylic acid halide having formula (VII) in which X is halogen, with an ester of formula (VIII) in the presence of an alkaline earth ba...

The present invention relates to novel oxabicyclo ether derivative compounds, compositions containing these ether derivative compounds, and methods of using these compounds or compositions to control the growth of undesired vegetation. More particularly, the present invention relates to a variety of compounds, compositions, and methods of using them which are herbicidally active on a wide variety ...

Process for the preparation of a salt of a di-cation ether having formula (I), wherein each substituent designated by R is independently selected from the class consisting of hydrogen, halogen, and alkyl radicals having up to about four carbon atoms, such that not more than one halogen is bonded to either ring, and said each radical designated by R' is selected from alkyl radicals having up to abo...

The present invention relates to hitherto unknown compounds of formula (I), in which m and n stand for an integer from 0-5, p stands for 0 or 1, and q stands for an integer from 0-4, R1 and R2 are the same or different and stand for hydrogen, halogen, nitro, amino, alkyl or alkoxy; R3 is hydroxy, hydrogen, straight or branched, saturated or unsaturated C1-C6 alkyl; R5 stands for an acidic group, e...

Compounds of the formula wherein R<1>, R<2>, R<3>, R<4>, X, m, n, o, p, q and r are as defined below. The compounds are memory enhancing cholinesterase inhibitors useful in enhancing memory, novel intermediates used in their synthesis, and analgesic agents.