Phosphonous trimethyl

Ending of names of anions and esters of inorganic oxoacids having the ic ending in the acid name, e.g. nitrate, phosphonate, trimethyl phosphate, and of anions and esters of organic acids, e.g. acetate, methyl acetate, thiocyanate. See Tables IR-8.1 and IR-8.2 and Table IX for more examples of ate anion names. See also inate , onate . 

The reaction of 1,2-dithiolanes with 2- and 4-picolyllithium has been examined <96PS(112)101> and the reactions of thioanhydrides such as 94 with both thiols <95JOC3964> and amines <96TL5337> have been reported. Treatment of 1,2-dithiolium salts with lithium or thallium cyclopentadienide results in formation of a variety of bi-, tri- and tetracyclic products <96LA109>. Reaction of 95 with trimethyl phosphite gives some of the desired coupling product but also the phosphonates 96 <96PS(109)557>. 

Diaikanol aminoalkyl phenols as admixtures enhance the strength [675]. The additives are useful in very small amounts and do not affect the initial properties of the fluid. The strength additive does not cause set acceleration or early set strength enhancement but provides enhanced compressive strength of the cement in later stages. Addition of small amounts of potassium ferricyanide and nitrile-trimethyl phosphonic acid promotes the formation of complex compounds and thus increases the strength of cement rock [1771]. 

Small amounts of pyridine bases increase the corrosion resistance of cement stone without any associated loss of strength [1016]. The use of nitrilo-trimethyl phosphonic acid and an adduct between hexamethylene tetramine and chlorinated propene or butene improves the adhesion to the metal, hardening times, mobility, and strength [ 1770]. The latter adducts are further claimed to be useful as additives in cementing oil and gas wells in salt-bearing strata [1768]. 

Nitrilo-Trimethyl Phosphonic Acid Hydrazine Hydrochloride... 

A corrosion-resistant formulation [1767] is achieved by adding phosphonic acid and hydrazine hydrochloride, as shown in Table 18-3. Hydrazine hydrochloride, combined with nitrilo-trimethyl phosphonic acid, provides a synergetic effect of increased inhibition of the plugging solution. 

Plugging Portland cement Nitrilo-trimethyl phosphonic acid Hydrazine hydrochloride Water 73.20-73.38 0.02-0.04 0.18-0.32 up to 100... 

Small amounts of phosphonium complexone [1560] are sufficient to increase adhesion to the stratal rock. Table 18-4 illustrates an example for plugging solution with Portland cement and phosphonium complexone. Calcium chloride acts as a regulator of the setting time in the suggested composition. More precisely, phosphonium complexone stands for certain chelating phosphorous compounds (e.g., oxyethylidene diphosphonic acid, nitrilo-trimethyl phosphonic acid, sodium tripolyphosphate, or amiphol) [1540]. The mixture is applicable at low temperatures from 20° to 75° C. 

Hemi-hydrated gypsum Waste obtained in production of nitrilo-trimethyl phosphonic acid [1594]... 

N. A. Okishev, A. G. Ivanov, and I. V. Karpenko. Plugging solution for oil and gas wells with increased sedimentation stability—containing Portland cement, nitrile trimethyl phosphonic acid, polyoxyethylene, water-soluble cationic polyelectrolyte and water. Patent RU 2039207-C,1995. 

P. F. Tsytsymushkin, S. R. Khajrullin, A. P. Tamavskij, P. V. Kovalenko, Z. N. Kudryashova, R. M. Iskhakov, V. N. Levshin, and V. M. Sudakov. Plugging solution for oil and gas wells—contains plugging Portland cement, nitrilo-trimethyl phosphonic acid, hydrazine hydrochloride and water and has corrosion-protective properties. Patent RU 2(X)2037-C,... 

Addition of trimethyl phosphite to substituted 2,5-bis(methoxy-carbonyl)cyclones provides products with addition both at the carbonyl carbon (phosphates) and at the a-carbon (phosphonates).348... 

Trimethyl phosphite (12.4 g, 0.1 mol) and p-methoxybenzyl chloride (15.6 g, 0.1 mol) were heated at reflux under a nitrogen atmosphere for 20 h. The residue was vacuum distilled (141°C/0.45 torr) to give the pure dimethyl (4-methoxybenzyl)phosphonate (12.6 g, 59%) as an oil, which exhibited spectra in accord with the proposed structure. 

Miscellaneous.—The formation of the phosphonate (93) from the action of P4S10 on the phosphorane (90),58 and from trimethyl phosphite and the thioketone (91),59 probably involves the intermediate 1,2-thiaphosphole (92) in both cases. The forma-... 

In concentrated solution, trimethyl phosphite and the nitro-olefin (96) gave the phosphorane (97), whereas in dilute solution the phosphonate (98) was produced. 1 Compound (97) was stable in refluxing ether but was converted into (98) in the... 

Antiblaze 19, a phosphonate ester and flame retardant used in textiles and polyurethane foam manufactured from trimethyl phosphite, dimethyl methylphosphonate, and trimethyl phosphate. 

The analogue in which carbon replaces oxygen in the enol ring should of course avoid the stability problem. The synthesis of this compound initially follows a scheme similar to that pioneered by the Corey group. Thus, acylation of the ester (7-2) with the anion from trimethyl phosphonate yields the activated phosphonate (7-3). Reaction of the yhde from that intermediate with the lactone (7-4) leads to a compound (7-5) that incorporates the lower side chain of natural prostaglandins. This is then taken on to lactone (7-6) by sequential reduction by means of zinc borohydride, removal of the biphenyl ester by saponification, and protection of the hydroxyl groups as tetrahydropyranyl ethers. 

Phenyl-N-(phenylmethylene)-l-propen-1-amine 1-Propen-1-amine, 2-phenyl-N-(phenylmethylene)-, (64244-34-4), 65, 119 (E)-3-[(E)-3-Phenyl-2-propenoxy]acry1lc acid, (88083-18-5), 66, 30, 31, 36 ( )-trans-2-(PHENYLSULFONYL)-3-PHENYLOXAZIRIDINE, 66, 203, 204 1-Phenyl-1-trimethylsiloxyethylene Silane, tnmethyl[(1-phenylvinyl)oxy]-, Silane, trimethyl[(l-phenylethenyl)oxy]- (13735-81-4), 65, 6 Phosphonate synthesis, 66, 194... 

Harada et al. studied the TiO2 photocatalytic mineralization of trimethyl phosphate, trimethyl phosphite, and O, (9-dimethyl ammonium phosphodithioate and reported excellent mass balance based on phosphate, sulfate, and carbon dioxide produced after prolonged illumination [39]. Subsequent studies found the organophosphorus insecticides dimethyl-2,2-dichlorovinyl phosphate [Eq. (5)] and di-methyl-2,2,2-trichloro-I-hydroxyethyl phosphonate were mineralized by solar irradiation in the presence of suspended TiO2 [40] ... 

McAlister, D.R., Horwitz, E.P. 2007. Characterization of extraction of chromatographic materials containing bis(2-ethyl-l-hexyl)phosphoric acid, 2-ethyl-1-hexyl (2-ethyl-1-hexyl) phosphonic acid, and bis(2,4,4-trimethyl-l-pentyl)phosphinic acid. Solvent Extraction and Ion Exchange 25(6) 757-769. 

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