A group of fatty acids with ‘tetramethylene interruption’ in the double bond system

1963 ◽  
Vol 19 (10) ◽  
pp. 522-523 ◽  
Author(s):  
Joanne L. Gellerman ◽  
H. Schlenk
Keyword(s):  
Fatty Acids ◽  
Double Bond ◽  
Double Bond System ◽  
Bond System

Natural and Synthetic Rubber. IV. 4-Methyl-4-Octene by Isoprene Ethylation

1930 ◽  
Vol 3 (3) ◽  
pp. 483-484
Author(s):  
Thomas Midgley ◽  
Albert L. Henne
Keyword(s):  
Double Bond ◽  
Synthetic Rubber ◽  
Double Bond System ◽  
Bond System ◽  
Usual Behavior ◽  
Natural And Synthetic ◽  
Long Chains

Abstract Isoprene has been ethylated; 4-methyl-4-octene was formed exclusively. The structure of this nonene is in agreement with the usual behavior of a conjugated double bond system. This type of addition is further evidence in favor of the hypothesis which regards the polymerization of isoprene to synthetic rubber as the formation of long chains of isoprene units linked together- by ordinary valences in the 1,4-position.

Über Derivate des Hydrazins, VII Zur Reaktivität von Bis(trimethylsilyl)aminoisocyanid / On Derivatives of Hydrazine, VII Reactivity of Bis(trimethylsilyl)aminoisocyanide

1977 ◽  
Vol 32 (9) ◽  
pp. 1003-1009 ◽  
Author(s):  
Nils Wiberg ◽  
Gerhard Hübler
Keyword(s):  
Double Bond ◽  
Oxidation State ◽  
Ring Cleavage ◽  
Reaction Paths ◽  
Stable Compound ◽  
Oxidizing Agents ◽  
Formal Oxidation State ◽  
Double Bond System ◽  
Bond System ◽  
Derivatives Of

The chemistry of bis(trimethylsilyl)aminoisocyanide (1) is determined by three reactive centres of the system : the hydrolyzable Si–N-bond, the oxidizable carbon in the formal oxidation state two, the additionable double bond system. Reactions of the oxygen stable compound 1 with halogens X2 or sulfenyl halides RSX as oxidizing agents gives compounds of type (Me3Si)2NNCX2 or (Me3Si)2NNCX(SR). Heterocumulenes such as CO2, CS2, RNCS (R = (Me3Si)2N), SO2 add to 1, leading to heterocycles, which decompose at higher temperatures by ring cleavage. With other heterocumulenes such as PhNCO, Me3SiNSO, Me3SiNSNSiMe3 products are found, the formation of which could be explained by reaction paths including the building and cleavage of heterocycles.

Studies with Alkylheteroaromatic Carbonitriles: A Novel Synthesis of Pyrazolo[2′,3′: 3,4]benzo[c]-1,2,4-triazine

1992 ◽  
Vol 47 (11) ◽  
pp. 1628-1632 ◽  
Author(s):  
Ahmed Hafez Hussein El-Ghandour ◽  
Mohamed Kamal Ahmed Ibrahim ◽  
Ibrahim Saad Abdel-Hafiz ◽  
Mohamed Hilmy Elnagdi
Keyword(s):  
Double Bond ◽  
Subsequent Treatment ◽  
Ring System ◽  
Novel Synthesis ◽  
Double Bond System ◽  
Bond System ◽  
Derivatives Of

A novel synthesis of derivatives of the title ring system by reacting methylpyrazolo[5,1-c]-1,2,4-triazin-6-carbonitriles (9) with sulphur and subsequent treatment of the resulting thienopyrazolotriazines with acetivated double bond system is described.

scholarly journals Zur Reaktivität von C=N-Doppelbindungssystemen, I / The Reactivity of the C=N Double Bond System, I

1974 ◽  
Vol 29 (9-10) ◽  
pp. 677-678 ◽  
Author(s):  
Erich Ziegler ◽  
Walter Ott ◽  
Michael Riegler
Keyword(s):  
Double Bond ◽  
Acetic Anhydride ◽  
Double Bond System ◽  
Bond System

The adduct from benzylidene aniline and acetic anhydride gives 1,4-diphenyl-azetidin-2-one if heated at 210°C in diphenylmethane or diphenylsilane.

Zur Reaktivität von C=N-Doppelbindungssystemen, V. Reaktionen mit Sulfonamiden / The Reactivity of the C=N-Double Bond System. V. Reactions with Sulfonamides

1975 ◽  
Vol 30 (11-12) ◽  
pp. 946-950 ◽  
Author(s):  
Erich Ziegler ◽  
Walter Rüf
Keyword(s):  
Double Bond ◽  
Acetic Anhydride ◽  
Double Bond System ◽  
Bond System

Sulfonamides react with aromatic aniles and acetic anhydride in boiling xylene yielding N-benzylidene sulfonamides, which give readily adducts with 1-phenyl-3-methyl-5-pyrazolone.

Zur Reaktivität von C=N-Doppelbindungssystemen, XV [1] Die Reaktion von Anilinomethylen-barbitursäuren mit methylenaktiven Nitrilen / The Reactivity of the C=N-Double Bond System, XV [1] The Reaction of Anilinomethylene-barbituric Acids with Methylenactive Nitriles

1978 ◽  
Vol 33 (9) ◽  
pp. 1016-1019 ◽  
Author(s):  
Helmut Wipfler ◽  
Erich Ziegler ◽  
Otto S. Wolfbeis
Keyword(s):  
Double Bond ◽  
Propenoic Acid ◽  
Double Bond System ◽  
Bond System

N,N′-Dimethyl-5-anilinomethylene-barbituric acids and its thio analogues react with alkyl cyanoacetates or malodinitrile in DMF in the presence of KOH to give 1,2,3,4- Tetrahydro-7 H-pyrano[2,3-d]pyrimidines, whereas N-unsubstituted anilinomethylenebarbituric acids under the same conditiones afford 1,2,3,4-tetrahydro-pyrimidine-5-propenoic acid derivatives.

scholarly journals Studies of the Conjugated Double Bond System I

1950 ◽  
Vol 71 (10) ◽  
pp. 527-530
Author(s):  
Saburo Nagakura ◽  
Hiroaki Baba
Keyword(s):  
Double Bond ◽  
Double Bond System ◽  
Bond System

Zur Reaktivität von C =N-Doppelbindungssystemen, VI Reaktionen mit Sulfonamiden und Sulfamiden / The Reactivity of the C=N-Double Bond System, VI Reactions with Sulfonamides and Sulfamides

1975 ◽  
Vol 30 (11-12) ◽  
pp. 951-953 ◽  
Author(s):  
Erich Ziegler ◽  
Walter Ruf
Keyword(s):  
Double Bond ◽  
Acetic Anhydride ◽  
Tert Butyl ◽  
Double Bond System ◽  
Bond System ◽  
Tert Butylamine

Benzenesulfonic amide reacts with N-methylene-tert-butylamine and acetic anhydride in boiling benzene to give 5-tert-butyl-1,3-benzenesulfonyl-perhydro-1,3,5-triazine. Sulfamide, and benzylidene aniline, and acetic anhydride (1:1:1) yield N-benzylidene sulfamide, or (1:2:2) N,N′-bis-benzylidene sulfamide.

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