Abstract:
A method of nitrating resorcinol which is selective for the production of the 4,6-dinitro resorcinal isomer. A resorcinol-based starting material is admixed with a nitrating solution from which substantially all nitrogen dioxide and nitrous has been removed. The nitrating solution contains white fuming nitric acid, a nitrosonium ion control agent such as urea, and, optionally, concentrated sulfuric acid. The 4,6-dinitroresorcinal isomer is provided in yields of about 65-85% with minimal production of undesirable side products.
Abstract:
A fungicidal composition which comprises as an active ingredient a compound of the formula: ##STR1## wherein X is a halogen atom, a C.sub.1 -C.sub.3 alkyl group or a C.sub.1 -C.sub.3 alkoxy group, and an inert carrier or diluent.
Abstract:
Acrylates of the general formula ##STR1## wherein R.sup.1 and R.sup.2 independently of one another are each C.sub.1 -C.sub.8 -alkyl, X is hydrogen, C.sub.1 -C.sub.4 -alkyl, halogen, C.sub.1 -C.sub.4 -alkoxy, haloalkyl, cyano or nitro, W is unsubstituted or alkyl-substituted, saturated or unsaturated C.sub.1 -C.sub.10 -alkylene, Y is hydrogen, alkyl, haloalkyl, alkoxyalkyl, cycloalkyl, aralkyl, aryl, aryloxy, halogen, an unsubstituted or substituted C.sub.4 H.sub.4 chain fused to the benzene radical, alkoxy, haloalkoxy, alkylthio, thiocyanato, cyano, NO.sub.2, aralkyloxy, ##STR2## and R' and R" independently of one another are each hydrogen, alkyl, alkoxy, alkylthio or cycloalkyl or are each phenyl which is unsubstituted or substituted by alkyl, halogen or alkoxy, and n is from 1 to 4, and fungicides containing them.
Abstract:
Novel antihypertensive and coronary dilating asymmetric diesters of 1,4-dihydro-2,6-dimethyl-pyridine-3,5-dicarboxylic acid (or the stereoisomers or pharmaceutically acceptable acid addition salts thereof) have the general formula (I): ##STR1## wherein Ph is phenyl, Ar is 2-nitrophenyl, 3-nitrophenyl, 2,3-dichlorophenyl or benzofurazan-4-yl, A is a straight or branched chain alkylene radical having from 2 to 6 carbon atoms, R is a straight or branched chain alkyl radical having from 1 to 6 carbon atoms, optionally mono-substituted by an alkoxy substituent having from 1 to 6 carbon atoms, R.sub.1 is hydrogen, hydroxy or an alkyl radical having from 1 to 4 carbon atoms, and R.sub.2 is hydrogen or methyl. The subject diesters are facilely prepared from the aldehydes ArCHO and esters of acetoacetic and 3-aminocrotonic acids.
Abstract:
2,4-Dinitrophenyl ethers are prepared by reacting a 2,4-dinitrochlorobenzene or 2,4-dinitrobromobenzene with an alkali metal alcoholate in a non-polar, inert solvent, at a temperature from -25.degree. C. to 50.degree. C.
Abstract:
2,4-Dichloro-3-alkyl-6-nitrophenols are prepared by chlorinating, with chlorine in the presence of a catalyst, 1-alkyl-4-nitrobenzenes having a C.sub.2 -C.sub.8 -alkyl radical until the content of trichloroalkylnitrobenzenes is at least 60% by weight in the chlorination mixture, removing the catalyst from the chlorination mixture, then hydrolyzing the chlorination mixture, removing the precipitated reaction product, and treating it with an aqueous inorganic acid. The 2,4-dichloro-3-alkyl-6-nitrophenols are new.
Abstract:
A heat developable light-sensitive material containing a compound represented by the general formula (I):[Ar.sub.n (R).sub.3-n CCO.sub.2 H].sub.l .multidot.B.sub.m (I)wherein ar represents an aryl group or a heterocyclic group; R represents a substituent other than an aryl group and a heterocyclic group; Ar and R may be bonded in a part thereof to form a ring; B represents a mono- or diacidic base which has a pKa of 7 or more and contains 12 or less carbon atoms; n represents an integer from 1 to 3; l and m each represents an integer of 1 or 2 and maintain a relationship in that a number of positive charge and a number of negative charge are equal; when n represents 1 or 2, two R's or Ar's may be the same or different, when n represents 3, three Ar's may be the same or different; and the substituent represented by Ar or R may be further substituted with a substituent. The compound represented by the general formula (I) is a base precursor which is stable at normal temperature but rapidly decomposes to release a base by heating and therefore the heat developable light-sensitive material containing the base precursor has excellent preservability and provides images having good image quality, i.e., low fog density and high image density upon a short period of developing time.
Abstract:
The invention concerns the manufacture of nitromethane by nitration of mene in a homogeneous gaseous phase, the nitrating agent being nitric acid, nitrogen peroxide or mixtures thereof. According to the disclosed process, the molar ratio methane/nitrating agent is between 0.1 and 5; the reaction contact time between 0.1 and 120 seconds; the reaction pressure between 1 and 35 bars; the temperature between 270.degree. and 600.degree. C. The nitration is carried out in the presence of an active agent of the halogen or derivative type introduced in a molar ratio at the most equal to 3. An installation is disclosed for industrially manufacturing nitromethane.
Abstract:
New benzo-1,4-quinones and salts thereof with organic or inorganic acid and bases have the formula I ##STR1## wherein p is 1 or 2 and q is 0 or 1, provided that p+q is 1 or 2, R is a residue of formula II ##STR2## wherein Q is selected from the residues --CO.sub.2 R.sub.4, --CON(R.sub.4)(R.sub.5), --OR.sub.5, --OCOR.sub.7, --N(R.sub.8)(R.sub.9), --PO(OR.sub.10)([O].sub.x R.sub.11), --SO.sub.2 R.sub.12, --CN, Halogen, --NO.sub.2 or --COR.sub.13, n is an integer from 1 to 20, k is 1 or 2 and x is 0 or 1, and R.sub.1 to R.sub.5 and R.sub.7 to R.sub.13 are as defined in the specification.The compounds of formula I are useful in photographic materials such as bleaching inhibitors in films of photographic silver dye bleach materials.
Abstract translation:新的苯并-1,4-醌及其与有机或无机酸和碱的盐具有式I(I)其中p为1或2,q为0或1,条件是p + q为1或2 R为残基-CO 2 R 4,-CON(R 4)(R 5),-OR 5,-OCOR 7,-N(R 8)(R 9),-PO (OR 10)([O] x R 11),-SO 2 R 12,-CN,卤素,-NO 2或-COR 13,n为1至20的整数,k为1或2,x为0或1,R1至R5和 R7至R13如说明书中所定义。 式I化合物可用于照相材料,如照相银染料漂白材料的薄膜中的漂白抑制剂。
Abstract:
A process for the preparation of a phenylglyocylic acid ester of the formula ##STR1## wherein R.sup.1 represents alkyl,X represents halogen, alkyl, halogenoalkyl, alkoxy or nitro, andn represents 0, 1, 2, or 3by contacting a benzoyl cyanide of the formula ##STR2## wherein X and n have the meanings stated above, in a sulphuric acid/water system in the presence of chloride ions at a temperature between 0.degree. and 70.degree. C. to form phenylglyoxylic acid amide and reacting the phenylglyoxylic acid amide without isolation with an alcohol of the formula R.sup.1 -OH, wherein R.sup.1 has the meaning stated above, optionally in the presence of a diluent, at a temperature between 40.degree. and 100.degree. C.