scholarly journals LXX.—The resolution of asymmetrical derivatives of phosphoric acid

1911 ◽  
Vol 99 (0) ◽  
pp. 626-636 ◽  
Author(s):  
Frederic Stanley Kipping ◽  
Frederick Challenger
Keyword(s):  
Phosphoric Acid ◽  
Derivatives Of

scholarly journals Synthesis of 3-Ferrocenyl Isocoumarins

2020 ◽  
Vol 36 (05) ◽  
pp. 976-979
Author(s):  
Neeta Sinha
Keyword(s):  
Spectral Analysis ◽  
Melting Point ◽  
Phosphoric Acid ◽  
Polyphosphoric Acid ◽  
Aluminium Chloride ◽  
Melting Point Determination ◽  
Anhydrous Aluminium Chloride ◽  
Point Determination ◽  
Derivatives Of

The derivatives of 3-ferrocenyl isocoumarin were synthesized by the condensation of substituted homothphalic anhydride with ferrocene using phosphoric acid or anhydrous aluminium chloride as cyclising agent. Substituted homophthalic acid did not condense with ferrocene so homophthalic acids were converted into their anhydride and then allowed to react with ferrocene in the presence of polyphosphoric acid or in the presence of anhydrous aluminium chloride using dichloromethane as the solvent to give 3-ferrocenyl isocoumarins. 7-Methoxy, 6-methyl, 5,7-dihydroxy, 6,7-dimethoxy and 5,7-dimethoxy derivatives of 3-ferrocenyl isocoumarin were synthesized. All the compounds were characterised by melting point determination, elemental and spectral analysis.

CCXIX.—The resolution of asymmetrical derivatives of phosphoric acid

1909 ◽  
Vol 95 (0) ◽  
pp. 1993-2009 ◽  
Author(s):  
Bernard Dunstan Wilkinson Luff ◽  
Frederic Stanley Kipping
Keyword(s):  
Phosphoric Acid ◽  
Derivatives Of

Synthesis of amides of organic derivatives of phosphoric acid

1955 ◽  
Vol 3 (6) ◽  
pp. 913-916
Author(s):  
B. A. Arbuzov ◽  
P. I. Alimov ◽  
M. A. Zvereva ◽  
I. D. Neklesova ◽  
M. A. Kudrina
Keyword(s):  
Phosphoric Acid ◽  
Derivatives Of

scholarly journals Researches on certain ethylphosphate

1864 ◽  
Vol 13 ◽  
pp. 520-531
Keyword(s):  
Phosphoric Acid ◽  
Metallic Elements ◽  
Direct Bearing ◽  
Present Purpose ◽  
The Subject ◽  
Derivatives Of

The constitution, properties, and derivatives of the so-called conjugated sulphurous and sulphuric acids have been made the subject of numerous searches, and have led, in the hands of Gerhardt and others, to very interesting results. I have examined at different times several members of the methylsulphuric, phenylsulphurous, nitrophenvlsulphous and other series, but have lately turned my attention to the analogous compounds of the phosphoric series. Some remarkable substances have been thus made, their constitution seeming to have a direct bearing upon the important question of the atomicity and equivalency of certain of the metallic elements. Several substances might have served as starting-points for these new inquiries. A curious compound, phenylphosphoric acid, C 6 H 5 H 2 PO 4 , was prepared; but its instability, and the oxidation to which it and its salts are liable, rendered it unsuited for the present purpose. I intend to describe in the present paper but one series of salts, formed from Pelouze’s ethylphosphoric acid, C 2 H 5 H 2 PO 4 . This compound, containing two atoms of easily replaceable hydrogen, appeared admirably adapted for the purpose in view. It is readily prepared by digesting (for 48 hours) finely crushed glacial phosphoric acid with alcohol of 90 percent.:— C 2 H 5 H } O + H PO 3 = C 2 H 3 H H } PO 4 .

scholarly journals The Isolation and Properties of Some Soluble Proteins From Wool V. The Isolation of the High-Sulphur Protein Scmkb2

1963 ◽  
Vol 16 (1) ◽  
pp. 241 ◽  
Author(s):  
JM Gillespie
Keyword(s):  
Phosphoric Acid ◽  
Acid Solution ◽  
Ammonium Sulphate ◽  
Protein Fraction ◽  
Deae Cellulose ◽  
Phosphoric Acid Solution ◽  
Fractional Precipitation ◽  
Salting Out ◽  
Three Samples ◽  
Derivatives Of

A protein fraction almost-devoid -of lysine and histidine and comparatively poor in arginine has been, separated from the S.carhoxymethyl derivatives of the high-sulphur proteins of :Mel'ino wool. The purification wa,;.; carried ~ut in throe stages: fractional precipitation by salting-out from dilute phosphoric acid solution, fractional precipitation at 'pH 6 ,with ammonium sulphate, and finally column chromatography at pH 8�6 on DEAE�cellulose. The protein is rich in S-carboxymethyl cysteine, serine, threonine, and proline. It has been isolated from three samples of l\ierino wool.

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