Chloride methyl urea

Chloroethyl)-3-[ (2-methyl-4-aminopyridin-5-yl)methyl] urea Sodium nitrite Hydrogen chloride... 

Several different methods have been employed for the preparation of diazo(trimethylsilyl)meth-ane (1). At present, the best synthetic method seems to be the diazo transfer reaction between diphenylphosphoryl azide and (trimethylsilyl)methylmagnesium chloride.However, the product often contains (chloromethyl)trimethylsilane and hexamethyldisiloxane as impurities. This method can also be employed for the synthesis of diazo(triethylsilyl)methane and diazo(di-ethylmethylsilyl)methane. The diazo transfer reaction can also be carried out with (trimethyl-silyl)methyllithium and tosyl azide. Other methods are the silylation of diazomethane with (trimethylsilyl)trifluoromethanesulfonate or chloro(trimethyl)silane and the base-induced cleavage of A-nitroso-A-[(trimethylsilyl)methyl]urea or the related carbamate or acet-amide.2° =... 

The benzalkonium chloride or methylbenzetho-ninm chloride, imidiazolidinyl urea, and diazo-lidinyl urea are added slowly, while thoroughly stirring, to a suspension of hydroxypropyl methyl cellulose and microcrystalline cellulose in a sterile normal saline solution (quantity sufficient to a make a thick paste) at 35°-37°C. 

CARBONATO de PLOMO (Spanish) (598-63-0) Contact with hot water, acids, acid fumes, or lead oxide causes decomposition with formation of carbon dioxide. Incompatible with acids, ammonia, fluorine, germanium, hydrozoic acid, lead diacetate, magnesium, mercurous chloride, methyl isocyanoacetate, silver nitrate, sodium peroxyborate, titanium, trinitrobenzoic acid, urea nitrate. 

Polyvinyl - methyl- ether Vinyl chloride polymers Urea- and melamineform-aldehyde condensates (uncured) Crosslinked (cured, vulcanized) polymers... 

Stannous oleate Stearyl alcohol Styrene/MA copolymer Terpene resin Tetrahydrofuran Titanium dioxide Toluene Tosylamide/formaldehyde resin Triethylene glycol Urea-formaldehyde resin Vinylidene chloride/acrylonitrile copolymer Vinylidene chloride/methyl acrylate copolymer Vinylidene chloride/vinyl chloride copolymer Zinc laurate cellophane, food-contact Aluminum stearates Ammonium tallate Hexamethoxymethylmelamine Nonoxynol-55 Nonoxynol-70... 

N-Hydroxysuccinic acid Imidazolidinyl urea Isopropylparaben Lauralkonium bromide Laurtrimonium bromide Laurtrimonium chloride Magnesium benzoate Magnesium propionate Magnesium salicylate MEA-benzoate MEA o-phenylphenate MEA-salicylate MEA-undecylenate Methenammonium chloride Methyl benzoate... 

Plastics materials and resins), for example, acrylics, acrylonitrile-butadiene-styrene, alkyds carbohydrate, casein, and cellulose acetate plastics cellulose nitrates elastomers epoxy, ethylene-vinyl acetate, ion exchange, methyl cellulose, methyl methacrylate, nitrocellulose, nylon, polyacrylonitrile, polyamide, polycarbonate, polyester, polyethylene, polyethylene terephthalate, polyurethane, polyvinyl alcohol, polyvinyl chloride, silicone, urea, resins thermoplastics, thermosets... 

The solution in A is now treated with mercuric chloride and methyl-red, and then titrated with Ml 10 HCl until its colour matches that of the solution in B. The difference in the volume of HCl run in from the burettes A and Bi is a measure of the amount of urea present. 

A convenient method for the synthesis of these low boiling materials consists of the reaction of /V,/V-dimethy1iirea [96-31-1] with toluene diisocyanate to yield an aUphatic—aromatic urea (84). Alternatively, an appropriate aUphatic—aromatic urea can be prepared by the reaction of diphenylcarbamoyl chloride [83-01-2] with methylamine. Thermolysis of either of the mixed ureas produces methyl isocyanate ia high yield (3,85). 

Poly(ethylene terephtlhalate) Phenol-formaldehyde Polyimide Polyisobutylene Poly(methyl methacrylate), acrylic Poly-4-methylpentene-1 Polyoxymethylene polyformaldehyde, acetal Polypropylene Polyphenylene ether Polyphenylene oxide Poly(phenylene sulphide) Poly(phenylene sulphone) Polystyrene Polysulfone Polytetrafluoroethylene Polyurethane Poly(vinyl acetate) Poly(vinyl alcohol) Poly(vinyl butyral) Poly(vinyl chloride) Poly(vinylidene chloride) Poly(vinylidene fluoride) Poly(vinyl formal) Polyvinylcarbazole Styrene Acrylonitrile Styrene butadiene rubber Styrene-butadiene-styrene Urea-formaldehyde Unsaturated polyester... 

In an interesting variation on this theme, the bis acid chloride of diethylmalonate (138) is condensed with the 0-methyl ether of urea to afford the imino ether of the barbituric acid (139). Heating this ether at 200°C results in 0 to N migration of the methyl group and formation of metharbital (140). ... 

The ureas, e.g. 28 (R = NMe2), derived from the corresponding 2-(l-arylviny )benzylamines by reaction with (dimethylamino)carbamoyl chloride (Me2NCOCl) in the presence of triethyl-amine, undergo cyclization in refluxing phosphoryl chloride to the 5-aryl-3-(dimethylamino)-l//-2-benzazepin-3-amines. e.g. 29a.84 Prepared similarly are the 3-(4-methylpiperazin-l-yl) compound 29b and the 3-methyl derivative 29c from the corresponding urea and amide, respectively. 

B. Polymeric Urea [Benzene, diethenyl-, polymer with ethenylbenzene, [[[[(1 methylethyl)amino]carbonyt]amino]methyl] deriv.] A 10.0-g. portion of benzylamine polymer beads prepared as in Part A and 125 ml. of tetrahydrofuran (Note 6) are combined in a 300-ml., three-necked, round-bottomed flask equipped with a magnetic stirrer, a dropping funnel, and a condenser fitted with a gas-inlet tube A nitrogen atmosphere is established in the system, and the slurry is stirred while 1.35 g. (0.0159 mole) of isopropyl isocyanate [Propane, 2-isocyanato-] is added. This causes an exothermic reaction, which subsides after about 20 minutes. The mixture is then stirred at room temperature for 22 hours and at reflux for an additional 4 hours. The beads are collected by filtration, washed with 150-ml. portions of tetrahydrofuran (Note 6) and methanol, and dried under reduced pressure over calcium chloride to yield 9.09 g, of the isopropyl urea polymer. 

Further routes of cyclizations have been studied in parallel in the case of cis- and rra/J5-2-hydroxymethyl-l-cyclohexylamine (106) (880PP73). The preparation of thiourea or urea adducts 107 and 108 with phenyl isothiocyanate or phenyl isocyanate proceeds smoothly. The reaction of 107 with methyl iodide and subsequent alkali treatment, by elimination of methyl mercaptan, resulted in the iminooxazine 109 in high yields. The ring closures of both cis and trans thiourea adducts to 1,3-oxazines proceed with retention. Cyclodesulfuration of the adduct 107 by mercury(II) oxide or N,N -dicyclohexylcarbodiimide resulted in the iminooxazine 109, but the yield was low and the purification of the product was cumbersome. The ring closure of 108 with thionyl chloride led to the iminooxazine 109 in only moderate yield. 

Problem 16.54 What products are formed when 1 mol of urea reacts with (a) 1 mol, (b) a second mol of methyl acetate (or acetyl chloride) ... 

Glutaraldehyde Solution Acetylacetone N-Amyl Mercaptan N-Amyl Alcohol Pentaerythritol 1-Pentene Amyl Acetate N-Amyl Alcohol Ethyl Butanol N-Amyl Chloride N-Amyl Methyl Ketone N - Amyltrochlorosilane Peracetic Acid Urea Peroxide Perchloric Acid Perchloric Acid... 

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