Triphenyl phosphite 3,5-dimethyl

Investigation of template poly condensation kinetics has only been studied within a very narrow scope. Polymerization of dimethyl tartrate with hexamethylene diamine was found to be enhanced by using as a template poly(vinyl pyrrolidone), poly(2-vinyl pyridine), or polysaccharides and poly(vinyl alcohol), poly(4-vinyl pyridine). In this case, the template can be treated as a catalyst. No information exists on the influence of the template on the order of reaction. The increase in molecular weight of the polymerization product by the template can be induced by a shift of equilibrium or by an increase in the reaction rate. A similar increase in the reaction rate was observed when poly(4-vi-nyl pyridine) was used in the synthesis of poly(terephtalamides) activated by triphenyl phosphite.The authors suggested that a high molecular weight template was involved in the increase of the local concentration of the substrate (terephthalic acid) by adsorption and activation via N-phosphonium salt of poly(4- vinyl pyridine). 

Potassium permanganate. Dimethyl sulfide-Chlorine. Dimethyl sulfoxide. Dimethyl sulfoxide-Chlorine. Dimethylsulf-oxide Sulfur trioxide. Dipyridine chro-mium(VI) oxide. Iodine. Iodine-Potassium iodide. Iodine tris(trifluoroacetate). Iodosobenzene diacetate. Isoamyl nitrite. Lead tetraacetate. Manganese dioxide. Mercuric acetate. Mercuric oxide. Osmium tetroxide—Potassium chlorate. Ozone. Periodic acid. Pertrifluoroacetic acid. Potassium ferrate. Potassium ferricyanide. Potassium nitrosodisulfonate. Ruthenium tetroxide. Selenium dioxide. Silver carbonate. Silver carbonate-Celite. Silver nitrate. Silver oxide. Silver(II) oxide. Sodium hypochlorite. Sulfur trioxide. Thalli-um(III) nitrate. Thallium sulfate. Thalli-um(III) trifluoroacetate. Triphenyl phosphite ozonide. Triphenylphosphine dibromide. Trityl fluoroborate. 

The analogous 2,2 -blpyridyl-[2,2-dimethyl-3-(2,2-dimethylcyclopropyl)cyclopropyl]phen-oxynickel (15) is obtained in 77% yield from a,a -bipyridyl-5-nickela-3,3,7,7-tetramethyl-exo-tricyclo[4.1.0.0. " ]heptane (13) upon treatment with phenol. Methanolysis of 15 gives a 70% yield of bi(2,2-dimethylcyclopropyl) (14). Direct acidolysis of 13 with hydrochloric acid or malonic acid is also possible and leads to the same hydrocarbon product 14 in even higher yield (91%). When 13 is treated with triphenyl phosphite at 60°C, three hydrocarbons are formed. Besides the cyclodimer 4 (3%), bi(2,2-dimethylcyclopropyl) (14, 6%) and 3-methyl-l-(2,2-dimethylcyclopropyl)buta-l,3-diene (16, 15%) have been identified. ... 

Phosphole sulfides reacted with diazoalkanes to give homophospholes which were transformed to phosphinines. Thus, 3,4-dimethyl-l-(methylsulfanyl)phosphole 1-sulfide on heating with ethyl diazoacetate reacted to give the homophosphole which rearranged on treatment with triphenyl phosphite to afford ethyl 4,5-dimethylphosphinine-2-carboxylate in good yield (Table 4). ... 

Olefins, synthesis -Butyllithium. 1,3-Dibenzyl-2-methyl-l, 3,2-diazaphospholidine. Dimethyl methylphosphonothioate. Diphenylsulfonium isopropylide. N-Methanesulfinyl-p-toluidine. Methylphosphoric acid bis(dimethylamide). Phosphoryl chloride-Stannous chloride-Pyridine. p- Toluenesulfonylhydrazine. Triphenyl phosphite. 

Attempts to convert the sulfones back into PASHs have been successful with a number of agents such as various metals (zinc, tin, magnesium, aluminum, iron, and nickel) in acetic acid, palladium on carbon with hydrazine, stannous chloride, lithium triethylborohydride, diphenylsi-lane, sodium borohydride, boron trifluoride, dicyclohexylcarbodiimide, triethyl phosphite, dimethyl dichlorosUane with lithium aluminum hydride, diphenylsilane, and triphenyl phosphine with iodine. However, none of them cleanly effect this conversion. 

OXIDATION, REAGENTS Acetyl nitrate. Bis(tri-n-butyltin)oxide. Bromine-Hexameth-ylphosphoric triamide. f-Butyl perbenzoate. Ceric ammonium nitrate. N-chlorosuc-cinimide-Dimethyl sulfide. Chromic add. Chromic anhydride. Chromic anhydride-Acetic anhydride. Chromic anhydride-Hexamethylphosphoric triamide. 2,3-Dichloro-5,6-dicyano-l,4-benzoquinone. Dimethyl sulfoxide. Dimethyl sulfoxide-Trifluoro-acetic anhydride. Diphenylseleninlc anhydride. Iodine tris(trifluoroacetate). Lead tetraacetate. N-Methylmorpholine -N-oxide. p-NitrobenzenesulfonyI peroxide. Oxygen, singlet. Palladlumfll) chloride. Peroxybcnzimidic acid. Phenylseleninyl chloride. N-Phenyl-l,2,4-triazoline-3,5-dione. Potassium chromate. Potassium superoxide. Pyri-dinium chlorodiromate. Salcomine. Silver carbonate-Celite. Sodium hypochlorite. Sulfuryl chloridc-Silica gel. Thallium(III) acetate. ThaUium(III) nitrate. Triphenyl phosphite ozonide. Trltyl tetrafluoroborate. Uranium hexafluoride. 

A solution of 45 g of triphenyl phosphite methiodide in 100 ml of dry dimethyl formamide was heated at 100°C and 0.08 mol of the acetylenic alcohol (commercially available] was added in 2 min. After stirring for 30 min at lOO c the mixture was cooled. The flask was equipped for vacuum distillation. On the flask were placed a 25-cm Vigreux column and two stoppers and the column was connected with a Condenser and a receiver. The DMF and the iodoallene distilled between... 

Related Reagents. Bromine-r-Butylamine Bromine Chloride Bromine-l,4-Diazabicyclo[2.2.2]octane Bromine-1,4-Dioxane Bromine-Silver(I) Oxide Bromine-Triphenyl Phosphite iV-Bromosuccinimide A7-Bromosiiccinimide-Dimethylformamide 7V-Bromosuccinimide-Dimethyl Sulfide Al-Bromosuccinimide-Sodium Azide Copper(II) Bromide Hy-drobromic Acid Mercury(II) Oxide-Bromine Phosphoms(III) Bromide Pyridinium Hydrobromide Perbromide Sodium Bromide Thallium(III) Acetate-Bromine. 

A mixture of 4-triphenylmethyl-l,2-benzoquinone, dimethyl phosphite, and dry benzene refluxed 2 hrs. dimethyl (5,6-dihydroxy- ,-a, -triphenyl-m-tolyl)phos-phonate. Y 90%. F. e., also reaction at oxygen with trialkyl phosphites, s. M. M. Sidky and F. H. Osman, Tetrahedron 29, 1725 (1973). 

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