General route to methoxy-substituted arylphosphonous dichlorides via mild Lewis acid catalysts

Miles, J. A. L.; Beeny, M. T.; Ratts, K. W.

doi:10.1021/jo00891a017

Cited by 41 publications

(11 citation statements)

References 3 publications

(8 reference statements)

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“…All reagents were distilled or otherwise purified prior to use. Dichloro(4‐methoxy phenyl)phosphine was prepared according to a literature procedure 44. Tetrahydrofuran (THF) and toluene were dried over and distilled from sodium/benzophenone prior to use.…”

Section: Methodsmentioning

confidence: 99%

On counting and counting errors

Güillery¹

2002

J of Comparative Neurology

359

360

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Counting objects in histological sections is often a necessary, sometimes an unexpected part of a research project. The recent literature shows that the subject of counting is of particular interest to readers of the Journal of Comparative Neurology but that it is also contentious and difficult. Even a brief review of past issues of the Journal shows that there are many misconceptions about counting and that there remain issues that have received little or no attention. Counts are subject to many errors. Some reports include readily recognizable errors, others fail to include all of the information that is needed for an evaluation of their accuracy. This review is above all a plea for adequate information about the methods used for counts in all publications. It serves to help those who are new to quantitative methods in histology; it considers some of the basic issues arising for anyone undertaking counts, or reviewing manuscripts that include counts. In particular, it considers recently introduced or re-introduced counting methods that depend on accurate measures along the axis perpendicular to the plane of the sections, and looks at the difficulties inherent in these measures.

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Section: Methodsmentioning

confidence: 99%

On counting and counting errors

Güillery¹

2002

J of Comparative Neurology

359

360

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“…Based on this precedent, we decided to see if this type of reaction could be used to prepare either 5 or 6. [28][29][30][31] The reaction of 2,2′-bithiophene with PCl 3 using SnCl 4 as the Lewis acid catalyst was much faster than the reaction of thiophene with PCl 3 . As shown in Fig.…”

Section: Syntheses Of Phosphonate-substituted Bithiophene Derivativesmentioning

confidence: 99%

Synthesis, linear and nonlinear optical properties of phosphonato-substituted bithiophenes derived from 2,2′-biphenol

et al. 2013

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Two new series of phosphonato-substituted bithiophenes, BpP(X)(C4H2S)2H and BpP(X)(C4H2S)2P(X)Bp (Bp = 2,2'-C12H8O2, X = O, S, Se), have been synthesized and characterized using linear absorption and emission spectra, and third-order nonlinear absorption measurements at 430 nm with 27 ps laser pulses. The compounds were synthesized in three steps: (1) reacting lithiated bithiophene with (Et2N)2PCl; (2) reacting the product from the first step with biphenol; and (3) reacting the product from the second step with the appropriate chalcogen. The X-ray crystal structures of two of the compounds, BpP(O)(C4H2S)2P(O)Bp and BpP(Se)(C4H2S)2P(Se)Bp, are reported and show a number of intermolecular π-π interactions. The linear absorption spectra, emission spectra, and emission quantum yields show distinct trends with respect to the chalcogen and the number of phosphorus substituents attached to the 2,2'-bithiophene ring. The compounds show emission maxima at wavelengths ranging from 380-400 nm and, BpP(S)(C4H2S)2H shows a 23-fold increase in fluorescence quantum yield relative to that of 2,2'-bithiophene. Fluorescence lifetimes and radiative and non-radiative decay rate constants for the first singlet excited state have been extracted from the quantum yields using time-dependent DFT calculations. Nonlinear transmission measurements indicate that all of the compounds show nonlinear absorption at 430 nm with 27 ps laser pulses in spite of their low solubilities. Notably, the nonlinear absorption threshold of a 0.16 mol L(-1) CH2Cl2 solution of BpP(Se)(C4H2S)2H is 0.9 J cm(-2). The excellent emission quantum yields and good nonlinear absorptions make these compounds promising candidates for optical power limiting applications and as host materials for violet-blue organic light emitting diodes.

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“…Also the corresponding 2-anisyldichlorophosphine (2) is prepared using the same method. Additionally, eight new phosphines (3)(4)(5)(6)(7)(8)(9)(10) are synthesized from 2-anisyl-and 2-thioanisyldichlorophosphines.…”

Section: Introductionmentioning

confidence: 99%

2-Thioanisyldichlorophosphine, new starting material for the preparation of multidentate phosphine ligands: syntheses and characterization of derivatives of 2-anisyl- and 2-thioanisyldichlorophosphines

Laitinen

Heikkinen

Haukka

et al. 2000

Journal of Organometallic Chemistry

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Laitinen, R.H; Heikkinen, V.; Haukka, M.; Koskinen, Ari; Pursiainen, J. 2-Thioanyldichlorophosphine, new starting material for the preparation of multidentate phosphine ligands: syntheses and characterisation of derivatives of 2-anisyl-and 2-thioanisyldichlorophosphines AbstractA new aryldichlorophosphine, 2-thioanisyldichlorophosphine, and its anisyl analogue, 2-anisyldichlorophosphine, were prepared by using an organozinc halide reagent of 2-thioanisole or 2-anisole with ethereal solution of PCl 3 in refluxing conditions. From these aryldichlorophosphines, eight new multidentate phosphine ligands containing 2-thioanisyl, 4-thioanisyl, 2-anisyl, 1-naphthyl and 9-anthracenyl groups were synthesized and characterized. Characterization was based mainly on NMR spectroscopy and X-ray crystallography. The crystal structures of six ligands are reported. The electronic effects on basicity of ligands are discussed.

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General route to methoxy-substituted arylphosphonous dichlorides via mild Lewis acid catalysts

Cited by 41 publications

References 3 publications

On counting and counting errors

On counting and counting errors

Synthesis, linear and nonlinear optical properties of phosphonato-substituted bithiophenes derived from 2,2′-biphenol

2-Thioanisyldichlorophosphine, new starting material for the preparation of multidentate phosphine ligands: syntheses and characterization of derivatives of 2-anisyl- and 2-thioanisyldichlorophosphines

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