Raman spectra of phenoxyacetic acid and chlorine substituted phenoxyacetic acids viz., o-chlorophenoxyacetic acid, p-chlorophenoxyacetic acid and 2,6-dichlorophenoxyacetic acid have been analysed with the aid of abinitio theoretical calculations. The effect of chlorine substituents on the Raman ...

Natural and semisynthetic compounds may be useful to obtain novel herbicides. Thymol and carvacrol, which belong to the class of phenols, are examples of molecules found in the nature that present phytotoxic activity. Thus, we aimed to synthesize phenoxyacetic acids from thymol and carvacrol and...

This study aims to investigate degradation mechanisms and kinetics of phenoxyacetic acid by ozonation in aqueous solution. The optimized operating condition was achieved by phenoxyacetic acid and total organic carbon (TOC) removal based on the studies of the effects of various parameters, such a...

Based on a previously reported phenoxyacetic acid scaffold, compound 7 (HWL-088) has been identified as a superior free fatty acid receptor 1 (FFA1) agonist by comprehensive structure-activity relationship study. Our results indicated that the introduction of ortho-fluoro greatly increased the a...

Publisher SummaryThis chapter discusses the metal borates. The chemistry of metal borates is surprisingly intricate. Early work was essentially of a synthetic nature, and it was the development of spectroscopic and X-ray crystallographic techniques that demonstrated the complexity of boron syste...

The sensitivity to SO2 of the SAW gas sensor coated with triethanolamine (TEA) modified with boric acid (H3BO3) (TEA and H3BO3 were mixed with a mole ratio 3:1) has been investigated. A better stability of the modified TEA film compared with that of TEA film was observed. Both the steady respons...

Boron as [B(OH)4]- reacts in aqueous solution with triols RC(CH2OH)3 (R = CH3, C2H5 or NH2) forming various amounts of mono-chelate, bis-chelate and cage structures which are identified and measured by 13C, 1H and “B NMR spectra. NMR spectra of the products of B(OH)3 with N(CH2CH2OH)3 or N(CH[C...

Potassium carbonate based solvents have the potential for capturing CO2 from emission sources such as power stations burning fossil fuels. However, due to poor reaction kinetics a rate promoter is considered necessary to improve the rate of reaction of CO2 with the solvent. Using a characterized...

A fast, selective, and sensitive GC-MS method has been developed and validated for the determination of boric acid in the drinking water by derivatization with triethanolamine. This analytic strategy successfully converts the inorganic, nonvolatile boric acid B(OH)3 present in the drinking water...

2-Nitro-2-nitrosopropane reacts with triethyl phosphite by deoxygenation of the nitroso- group to give 2-nitriminopropane; 1-nitro-1-nitrosocyclohexane reacts similarly. The reaction proceedsvia an intermediate detectable byNMR; possible structures for this intermediate and for the course of the...

Nucleophilic addition of triethyl phosphite to 3-acetoxy-2-methylenealkanenitriles and methyl 3-acetoxy-2-methylenealkanoates provides (2E)-2-(diethoxyphosphorylmethyl)alk-2- enenitriles and methyl (2Z)-2-(diethoxy-phosphorylmethyl)alk-2-enoates respectively with good stereoselectivity.

Triethyl phosphite and elemental iodine in solution give transient iodotriethyl-phosphonium iodide which eliminates ethyl iodide to form diethyl phosphoroiodidate. An examination of the 31P NMR and IR spectra over the temperature range −100° − 0°C fails to disclose any evidence for triethoxydi...

(E)-Alkenyl halides were transformed into (E)-alkenyl sulfides by the nickel(0) triethyl phosphite complex-catalyzed reaction with thiols, whereas (Z)-alkenyl halides gave alkynes under the same reaction conditions. Aryl halides were also transformed into aryl sulfides using the same reagent system.

Dibromo and dichloro phenylnitromethanes reacted with triethyl phosphite to yield mainly benzonitrile, ethyl halide, and triethyl phosphate. In addition, the products of molecular rearrangement, N,N-diphenylurea, N-phenylbenzamide, and aniline, were isolated. It is proposed that they arise from ...

The application of cerium(IV) oxide (CeO2) as a neutral and heterogeneous catalyst for aldehyde-induced decarboxylative coupling of l-proline with triethyl phosphite and nitromethane is described. In addition, a [3+2] cycloaddition reaction of the in situ generated 1,3-dipolar intermediate with ...

In contrast to aliphatic lactams, which gave cyclic aminomethylene-gem-bisphosphonates in reaction with triethyl phosphite and phosphoryl chloride, the corresponding benzoannulated lactams usually provide monophosphonates of variable structures, which depend on size of the substrate aliphatic ri...

The Perkow reaction of triethyl phosphite and β-alkoxyvinyl trihalogenomethyl ketones, which have common acyclic or cyclic structural fragment: –O–CC–C(O)CX2Cl, yielded dienyl phosphates: –O–CC–C[OP(O)(OEt)2]CX2 where X = F or Cl, whereas γ-bromo-β-methoxy-α,β-unsaturated trifluoromet...

An efficient method was developed for the nickel-catalyzed phosphonylation of aryl triflates with triethyl phosphite, in which KBr as an additive promoted the SN2 catalytic step. To the best of our knowledge, this is the first example of nickel-catalyzed Arbuzov reactions of aryl triflates. Most...

The chemoselective S-alkylation of 2-thiohydantoins is reported. The methodology involves the use of alkyl orthoformates (trimethyl and triethyl) as alkylating agents, which in the presence of Ac2O and ZnCl2 chemoselectively alkylate the thio group whilst other nucleophilic groups present in the...

A convenient, practical and highly efficient one-pot method has been developed for the synthesis of triaryl- and triheteroarylmethane derivatives by Bi(OTf)3-catalyzed Friedel-Crafts alkylation of trialkyl orthoformates in combination with a wide variety of arenes/heteroarenes at room temperatur...