摘要:
The present invention describes chemical systems and methods for silylating aromatic organic substrates, said system or method comprising or consisting essentially of a mixture of (a) at least one organosilane and (b) at least one strong base, the definition of strong base now also including KOH, said system being preferably, but not necessarily substantially free of a transition-metal compound, and said methods comprising contacting a quantity of the organic substrate with a mixture of (a) at least one organosilane and (b) at least one strong base, under conditions sufficient to silylate the aromatic substrate.
摘要:
A modified opioid is provided comprising modified morphine molecules, wherein for each morphine molecule, one or more carbon atoms are replaced with silicon atoms. A method is further provided for modifying an opioid comprising morphine molecules, said method comprising the step of replacing one or more carbon atoms with silicon atoms.
摘要:
Modified macromolecular compounds obtainable by using specific amino silane polymerization initiator compounds and optionally chain end-modifying compounds are described. Polymer compositions including such modified macromolecular compounds and the use of such compositions in the preparation of vulcanized (crosslinked) elastomeric polymer compositions and articles are described.
摘要:
The present invention relates to a process for producing N-alkyl-N-trialkylsilylamides from trialkylsilylhalides and N-alkylamides in the presence of a base and in the absence of a solvent.
摘要:
A hydrosilylation method is provided. In this hydrosilylation method, silylation of the carbon atom other than the terminal carbon atom and generation of the by-product isomer by internal migration of the double bond are suppressed without sacrificing the hydrosilylation reactivity, even if an olefin compound having tertiary amine atom which can be a catalyst poison was used. In the hydrosilylation, an olefin compound having carbon-carbon unsaturated bond, and a compound having hydrogensilyl group are reacted in the presence of an acid amide compound, a nitrile compound and an aromatic hydroxyl compound, or an organoamine salt compound, by using catalytic action of platinum and/or its complex compound.
摘要:
An insecticidal composition comprising, in admixture with an agriculturally acceptable carrier, an insecticidally effective amount of a 1,2,4-triazine compound of the formula ##STR1## wherein m is 0 to 12; n is 0 or 1; T is CH.sub.2, CH.dbd.CH, or C.tbd.C; X is Si(CH.sub.3).sub.2, C(CH.sub.3).sub.2, CH(CH.sub.3), or O; or R is methyl, vinyl, cyclopentyl, phenyl, naphthyl, or a substituted phenyl of the formula: ##STR2## wherein Q, U, W, Y, Z, and R.sup.1, R.sup.2, R.sup.3, R.sup.4 are as defined herein; and methods of using the same.
摘要:
A process is described for the hydrided of halogen-substituted compounds of the second to fourth period of Groups III to V of the periodic system, with the exception of gallium, aluminum, carbon, or nitrogen. A finely-granulated aluminum is added to a molten salt melt that consists of 50-67 molar % AlCl.sub.3 (anhydrous) and 50 to 33 molar % of sodium chloride. Then to the stirred, or by some other means dispersed suspension, hydrogen is introduced to hydrided the finely-dispersed aluminum. Thereafter the mixture is reacted with the halogen-substituted compound and the resulting hydrided compound is renewed.
摘要:
The present invention is a process for the preparation of primary aminoorganosilanes. The process comprises contacting an cyanoorganosilane with hydrogen gas in the presence of a supported cobalt catalyst. The result of this process is a near quantitative conversion of the cyanoorganosilane to a primary aminoorganosilane. The apparent rate and yield of the process can be improved by use of an organic solvent, without effecting specificity for the primary aminoorganosilane.
摘要:
An improved process for the preparation of multi-organic substituted silanes from the reaction of halides of silicon with an alkyl halide in the presence of a halogen-accepting metal is described. The improvement integrates a redistribution process into the alkylation process. The redistribution process involves an interaction between a multi-organic substituted silane and a halosilane with fewer organic substituents whereby an organic group from the multi-organic substituted silane is exchanged with a halogen group of the less organic substituted halosilane.
摘要:
Organosilicon compounds containing at least one acylamino-substituted hydrocarbon radical are prepared by reacting an organosilicon compound containing at least one amino-substituted hydrocarbon radical with an acyl halide in a nonaqueous solvent in the presence of an aqueous alkaline material and an additive that facilitates the transfer of the alkaline material into the nonaqueous phase.