- Preparation method of azodicarbonamide
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The preparation method comprises the following steps: Step S1, reacting hydrazine hydrochloride and dimethylbenzoyl chloride to form an intermediate. Step S2: The intermediate is subjected to an even nitridation reaction to give the azodicarboxamide. To the preparation method disclosed by the embodiment of the invention, the adopted raw material is high in safety, less in three wastes formed in production, and the obtained product can be obtained by effectively separating and drying, and pure product TMDA can be obtained without being purified again.
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Paragraph 0040; 0050; 0053-0057; 0060-0063
(2021/12/07)
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- N,N,N',N'-Tetramethylazodicarboxamide (TMAD), A New Versatile Reagent for Mitsunobu Reaction. Its Application to Synthesis of Secondary Amines
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N,N,N',N'-Tetramethylazodicarboxamide, (TMAD), was found to be more versatile in the Mitsunobu reaction than traditional diethyl azodicarboxylate or recently developed 1,1'-(azodicarbonyl)dipiperidine, when used in combination with tributylphosphine in benzene.The usefulness of the reagent was demonstrated by the highly efficient two-step synthesis of benzylcrotylamine from N-benzyltrifluoroacetamide.
- Tsunoda, Tetsuto,Otsuka, Junko,Yamamiya, Yoshiko,Ito, Sho
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p. 539 - 542
(2007/10/02)
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- Oil-soluble bicarbamamide compounds
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The oil-soluble azo compounds of this invention are useful as dispersants, corrosion inhibitors and anti-wear agents in lubricating oil and fuel compositions. The predominant oil-soluble azo reaction product may be represented by the following formulas: STR1 wherein R represents an oil-solubilizing, synthetic, polymeric organic radical containing at least 20 carbon atoms, Y is independently selected from the group consisting of --NR2 R3 and --SR4, R2, r3, and R4 are independently selected from hydrogen, alkyl, cycloalkyl, aryl, alkaryl and aralkyl, X is independently selected from oxygen, sulfur and =NR5, with the proviso that when X is =NR5, Y is --NR2 R3, R5 is selected from the group consisting of alkyl, cycloalkyl, aryl and alkaryl, Z represents a polyvalent organic radical having a valence of n and selected from hydrocarbon, oxahydrocarbon, azahydrocarbon and thiahydrocarbon radicals and their oxygenated and halogenated derivatives, E is a monovalent radical selected from alkyl, cycloalkyl, aralkyl, aryl, and alkaryl, and n is an integer from 2 to 5.
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