677-43-0Relevant articles and documents
REACTION OF 1,1-DICHLORO-1-NITROSOBUTANE WITH N,N-DIMETHYLAMIDODICHLOROPHOSPHITE
Sokolov, V. B.,Ivanov, A. N.,Epishina, T. A.,Martynov, I. V.
, p. 1296 - 1298 (1989)
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A cyclic phosphorus method for preparing cooperates the effect halogen-free flame retardant,
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Paragraph 0019; 0028-0032, (2017/02/17)
The invention relates to a preparation method of a cyclic phosphorus-nitrogen synergistic halogen-free flame retardant, particularly a preparation method of 2,7-di(N,N-dimethylamino)-1,6,3,8,2,7-octahydrodioxadiazolyldiphosphinic acid, belonging to the field of preparation of novel halogen-free flame retardants. The method comprises the following steps: by using an organic solvent as a solvent and alkali as an acid-binding agent, stirring phosphorus oxychloride and dimethylamine hydrochloride to react at -25-0 DEG C until no white precipitate is generated; leaving the low-temperature environment, naturally heating the reaction system to room temperature, and continuing the reaction at room temperature for 2-5 hours; carrying out vacuum filtration to remove the precipitate, thereby obtaining a filtrate; and carrying out secondary heating, and carrying out vacuum filtration to remove the precipitate, thereby obtaining the 2,7-di(N,N-dimethylamino)-1,6,3,8,2,7-octahydrodioxadiazolyldiphosphinic acid. The method has the advantages of simple technique and low cost, can easily implement industrial production, and has wide market application prospects.
Synthesis and antitumor activity of nonsymmetric phosphoric acid triamides
Kosykhova,Palaima,Stumbryavichyute
, p. 525 - 527 (2007/10/03)
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