THE ACETIC ANHYDRIDE SULPHURIC ACID TEST FOR GENERAL PARALYSIS

1928 ◽  
Vol 68 (2) ◽  
pp. 155-156 ◽  
Author(s):  
A. MYERSON ◽  
R. D. HALLORAN
Keyword(s):  
Acetic Anhydride ◽  
Sulphuric Acid ◽  
General Paralysis ◽  
Acid Test

Note on the sulphuric acid test for fish liver oils

The Analyst ◽  
1923 ◽  
Vol 48 (563) ◽  
pp. 58
Author(s):  
Norman Evers ◽  
H. J. Foster
Keyword(s):  
Sulphuric Acid ◽  
Fish Liver ◽  
Acid Test

REACTIONS OF PHENYL-SUBSTITUTED HETEROCYCLIC COMPOUNDS: V. NITRATIONS OF 1,3- AND 1,5-DIPHENYLPYRAZOLES

1964 ◽  
Vol 42 (7) ◽  
pp. 1605-1615 ◽  
Author(s):  
Brian M. Lynch ◽  
Yuic-Yung Hung
Keyword(s):  
Nitric Acid ◽  
Magnetic Resonance ◽  
Acetic Anhydride ◽  
Sulphuric Acid ◽  
Heterocyclic Compounds ◽  
Substituted 1

Dinitration of 1,3- or 1,5-diphenylpyrazole in sulphuric acid yields the corresponding di(p-nitrophenyl) compounds, while nitric acid–acetic anhydride yields the 4-nitro-1-p-nitrophenyl compounds.Mononitration at the 4-position occurs when the diphenylpyrazoles and several other 1-phenylpyrazoles are nitrated at 0° by nitric acid–acetic anhydride.Possible explanations of the dependence of orientation on the nature of the nitrating agent-are discussed.Nuclear magnetic resonance (n.m.r.) spectroscopy was used in demonstrating the structures of many of the nitration products, and a general discussion of the n.m.r. spectra of substituted 1-phenylpyrazoles is given.

Cyclic nitrones. II. Reactions of a cyclic α-keto nitrone with acetic anhydride, acetone, and methyl acetoacetate

1967 ◽  
Vol 20 (11) ◽  
pp. 2485 ◽  
Author(s):  
RFC Brown ◽  
WD Crow ◽  
L Subrahmanyan ◽  
CS Barnes
Keyword(s):  
Acetic Anhydride ◽  
Sulphuric Acid ◽  
Functional Groups ◽  
Potassium Hydroxide ◽  
Methyl Acetoacetate ◽  
Cyclic Nitrones ◽  
Aqueous Potassium Hydroxide ◽  
Isopropenyl Acetate

The cyclic α-keto nitrone 3,4,5,6-tetrahydro-5,5-dimethyl-3-oxopyridine 1-oxide (III) when treated with acetic anhydride and sulphuric acid gave in low yield a compound (XI) having both enol lactone and vinylogous amide functional groups. Hydrolysis and decarboxylation of compound (XI) with aqueous potassium hydroxide gave a vinylogous amide (V), also obtained by acid- or base-catalysed condensation of compound (III) with isopropenyl acetate or acetone. Base-catalysed condensation of (III) with methyl acetoacetate gave an ester (XVII) closely related to compound (V).

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