摘要:
The present invention relates to crop culture and is particularly concerned with practices for conserving soil nitrogen and for supplying the soil nitrogen requirements for plant nutrition. These practices involve the employment, as active agent, of a novel butane compound having the formula ##STR1## wherein each Y is independently hydrogen, chloro-, bromo-, fluoro- or methyl; Z is a straight or branched chain alkyl of 1-4 carbon atoms; R is C.sub.1 -C.sub.4 alkyl, C.sub.1 -C.sub.4 alkoxy or halo and n is an integer from 0 to 2.
摘要:
Compounds are prepared corresponding to the formula ##STR1## WHEREIN R represents hydrogen or methylenethiocyanate (--CH.sub.2 SCN) and each of R.sup.1 and R.sup.2 represents loweralkyl of 1 to 4 carbon atoms. Those compounds wherein R is methylenethiocyanate have been found to be active antimicrobial agents and those wherein R is hydrogen are useful as intermediates therefor.
摘要:
Cyclopropylcyanide is prepared by an improved process comprising reacting by contacting a .gamma.-halo-butyronitrile or mixture thereof, with an alkali metal hydroxide in the presence of a catalytic amount of an onium salt. For example, the reaction of 4-chlorobutyronitrile with sodium hydroxide in the presence of benzyltriethylammonium chloride produces cyclopropylcyanide in high yield.
摘要:
The present invention relates to novel diepoxides having the formulas I. and II. R*SO2N(A)RN(A)SO2R* where A=2,3-epoxypropyl, R* is a monovalent hydrocarbon radical or an inertly substituted hydrocarbon radical and R is a divalent hydrocarbon radical or an inertly substituted divalent hydrocarbon radical. The epoxies are useful in preparing novel epoxide resins.
摘要:
The present invention relates to the preparation of ethers and esters of diallylphenols and the epoxidation of the diallyl moiety to provide bis-epoxide ether and ester intermediates useful in the preparation of epoxy resins.
摘要:
The present invention relates to novel epoxides having the formulas where Y is a CO, CO2 or SO2, AR is the same or different divalent unsubstituted or substituted aromatic, halogen-substituted aromatic or cyano-substituted aromatic hydrocarbon radical having from 6 to 20 carbon atoms, Z is a divalent hydrocarbon or ether radical having from 1 to 20 carbon atoms, including Y-Z-Y being CO, and R* is an alkyl, aryl, arylalkyl, alkoxy, aryloxy or arylalkoxy radical having from 0-20 carbon atoms. The epoxides of the present invention are useful in the formation of epoxy resins.
摘要:
An improved process for the nitration of a substituted or unsubstituted benzocyclobutene compound in a reaction mixture comprising a nitrating agent, an unhalogenated carboxylic acid anhydride, clay and a solvent to produce a corresponding nitrobenzocyclobutene compound, is that wherein:(a) the solvent has a density above that of the nitrating agent or an extractable precursor thereof;(b) the reaction mixture is heated at a temperature such that solvent is removed from the reaction mixture to a site outside the reaction mixture to extract nitrating agent or extractable precursor thereof; and(c) the thus-extracted nitrating agent or precursor thereof is fed into the reaction mixture to nitrate the benzocyclobutene compound.
摘要:
Dimercapto-substituted dinitriles are prepared which correspond to the formula: ##STR1## wherein X represents: ##STR2## These compounds have been found to exhibit antimicrobial activity in industrial and commercial applications and compositions containing these compounds are so employed.
摘要:
3-chloromethylbenzocyclobutene is prepared by reacting benzocyclobutene with chloromethyl methyl ether in the presence of stannic chloride at a temperature of about -120.degree. C. to about -40.degree. C. and neutralizing the resulting reaction mixture comprising 3-chloromethylbenzocyclobutene at a temperature of about -80.degree. C. to about -70.degree. C.
摘要:
2,6-Difluoroaniline is prepared from 1,2,3-trichlorobenzene by partial fluorine exchange to a mixture of 2,6-difluorochlorobenzene and 2,3-difluorochlorobenzene, amination of the chloro substituents, and separation of the desired product from the isomeric 2,3-difluoroaniline. By incorporating a selective reduction into the process immediately after the partial fluorine exchange, the undesirable 2,3-difluorochlorobenzene is converted into valuable ortho-difluorobenzene and the 2,3-difluoroaniline isomer is avoided.