Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

With triphenyl phosphite and

Cyclohexanediol, from hy-droquinone, 51, 105 Cyclohexanol, with triphenyl phosphite and methyl iodide,... [Pg.57]

Methylenecyclopropanes, 50, 30 3-Methylheptan-4-ol, 52, 22 Methyl iodide, with triphenyl phosphite and cyclohexanol,... [Pg.132]

Cyclohexanol, with triphenyl phosphite and mettyl iodide, 51,45 CYCLOHEXANONE, 2-DIAZO-, 51, 6... [Pg.73]

Methylcyclohexene, from 2-methyl-cyclohexanone tosylhydrazone and methyllithium, 51,69 Methylenecyclopropanes, 50,30 Methyl iodide, with triphenyl phosphite and cyclohexanol, 51,45 with triphenyl phosphite and neopentyl alcohol, 51,44 METHYL ftrans-2-IODO-l-TETRA-LIN)CARBAMATE, 51,112 Methyl (frans-2-iodo-l-tetralin)carba-mate, with potassium hydroxide to give 1,2,3,4-tetrahydronaph-thalene(l,2)imine, 51,53 Methyllithium, with camphor tosylhydrazone to give 2-bomene, 51, 66... [Pg.79]

The reaction of pyrrolidone with triphenyl phosphite and benzaldehyde, leading to l-(phenyldiphenoxyphosphorylmethyl)-2-pyrrolidone, has been described [75],... [Pg.14]

Therefore, additional heat aging tests were conducted to investigate the possibility that hydroquinone-derived phenolic groups might function differently from the monohydric phenols and somehow contribute to the high activity of the phenolic-phosphite systems. Two substituted hydro-quinones, two polymeric phenolic phosphites based on those hydro-quinones, and combinations of the hydroquinones with triphenyl phosphite and tris(nonylphenyl) phosphite were evaluated in the oven-aging test again 0.4% DLTDP was included in the formulations. [Pg.231]

The phosphorus activation of alcohols to substitution with inversion of configuration. The reactions are based on the high heat of formation of the P-O bond and the tendency for phosphorus to form multiple bonds with oxygen. For example, treatment of an alcohol with triphenyl phosphite and methyl iodide leads to the corresponding iodo compound (Scheme 2.17). [Pg.40]

The polycondensation reaction is more profitably utilized in the preparation of polyhydrazides and poly(amide-hydrazides) with high molecular weights 19 which are difficult to be produced by the phosphorylation reaction with triphenyl phosphite and pyridine20. The results of the polycondensation reaction of p-aminoben-zoylhydrazide(p-ABH) with dicarboxylic acids in the presence of triphenyl phosphite and LiCl are listed in Table 11. [Pg.16]

Direct Polycondensations with Triphenyl Phosphite and Lithium Chloride... [Pg.106]

An interesting topological effect is the increased terminal chlorination of fatty acids when they are adsorbed and aligned on alumina Silicon disulfide and particularly boron sulfide have been used with advantage instead of phosphorus pentasulfide to replace carbonyl oxygen by sulfur The addition of sulfur monochloride to olefins followed by reduction of the adduct with sodium sulfide provides a convenient inexpensive route to a large number of episulfides A direct conversion of ar. nitro compounds to isothiocyanates has been reported Sec. phosphines add easily to olefins under UV-irradiation Advances in peptide synthesis include the use of acyloxyphospho-nium salts prepared with hexamethylphosphoramide a simple synthesis with triphenyl phosphite , and the use 4-picolyl esters at the... [Pg.11]

It should be pointed out that the side reactions during the transesterification of diphenyl H-phosphonate are strongly depressed. In diphenyl H-phosphonate, there is only one electrophilic center—the phosphorus atom. It is shown that reaction mixtures resulting from transesterification of diphenyl H-phosphonate with alcohols in pyridine were contaminated with triphenyl phosphite and phenyl H-phosphonate, products of the disproportionation of diphenyl H-phosphonate [34]. [Pg.33]

Alternative reaction conditions have since been developed to synthesize acylanthranils 36 from anthranilic acid. Treatment of 1 with benzoic acid and triphenyl phosphite in pyridine produced acylanthranil 36 (R = Ph) in 84% yield. It was not necessary to isolate acylanthranil 36. Instead the reaction mixture could be treated directly with aniline to give 37 (R = Ph) in 90% yield. Alternatively, it was found that treatment of N-acylanthranilic acid 27 (R = Me, Ph) with triphenyl phosphite and aniline in pyridine furnished 37 in 84% yield (R = Me) and 90% yield (R = Ph). Experimental evidence suggests that formation of 37 from acylanthranil 36 occurs via formation of an amidine as a result of attack of the aniline nitrogen on the C2 carbon of 36 followed by cyclization. ... [Pg.446]

To the best of our knowledge, Imai et al. [50] were the first to investigate this technique for the synthesis of polyether-amides containing aromatic diamines. The polycondensation was successfully carried out in N-methyl-2-pyr-rolidone (NMP) at 100°C with triphenyl phosphite and pyridine in the presence of LiCl and CaCl2. Yamashita et al [51] attempted the synthesis of PA6.6-PEO segmented copolymers, but the yields were rather low. [Pg.247]


See other pages where With triphenyl phosphite and is mentioned: [Pg.62]    [Pg.132]    [Pg.75]    [Pg.14]   


SEARCH



Neopentyl alcohol, with triphenyl phosphite and methyl

Neopentyl alcohol, with triphenyl phosphite and methyl iodide

Phosphite triphenyl

Phosphites, triphenyl

Triphenyl

Triphenyl phosphite, with methyl iodide and cyclohexanol

Triphenyls

With phosphites

With triphenyl phosphite and neopentyl alcohol

© 2024 chempedia.info