158752-98-8Relevant articles and documents
The active metal sodium or lithium quenching method (by machine translation)
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Paragraph 0017, (2019/04/26)
This invention claims an active metal sodium or [...] method. In the use of the metal sodium to participate in free radical coupling reaction or metal lithium participation when halogen lithium exchange reaction, reaction to the end of the excess active metal usually security quenching, excessive metal sodium and lithium adopts the halogenated hydrocarbon to process quenching, to avoid using traditional water or mellow quenching when the generation of hydrogen gas, operating the safety factor is increased. The method is simple in operation, the generated coupling alkane does not influence the reaction processing, is suitable for industrial scale production quenching using. (by machine translation)
Synthesis and structure of pyrrolidinobromodiboranes(4)
Nie, Yong,Pritzkow, Hans,Siebert, Walter
, p. 1016 - 1019 (2007/10/03)
The reaction of tetrapyrrolidinodiborane(4) (1) with BBr3 in a 1:1 molar ratio yields a mixture of 1,2-dibromo-1,2-dipyrrolidinodiborane(4) (2) and bromotripyrrolidino- diborane(4) (3), while a 1:2 molar ratio leads in Et2O to compound 2 as the main product along with a small amount of [(C4H8N)2B2Br3(OEt)] (4). The new compounds have been characterized by NMR and MS data, as well as by X-ray structure analyses of 2 and 4, of which the former exhibits an interesting polymorphism phenomenon.
Contribution to the Chemistry of Boron, 222. Chemistry of Diborane(4) Derivatives: Mixed Tetraaminodiboranes(4) and Additions of Diborane(4) Derivatives to an Amino-imino-borane
Loderer, Dirk,Noeth, Heinrich,Pommerening, Hans,Rattay, Wilfried,Schick, Hannes
, p. 1605 - 1612 (2007/10/02)
Several transamination reactions of B2(NMe2)4 (1a) with secondary amines have led to mixed tetraaminodiborane(4) compounds B2(NMe2)4-n(NR2)n (2-4), and B2(NC5H10)4 (1d) has been characterized by an X-ray structure analysis which reveals the presence of a rather long B-B bond (1.75 Angstroem).However, tetraaminodiboranes(4) of type R2N(Me2N)B-B(NMe2)NR2 are more readily accessible from LiNR2 and B2(NMe2)2Cl2.Similarly, amination of B2(NMe2)2Cl2 with N,N'-dimethylethylenediamine (7) yields B--N,N'-dimethyl-1,3,2-diazaborolidine (8), while reactions with Li(Me)N-CH2-CH2-N(Me)Li (9) lead also to 2,3-bis(dimethylamino)-1,4-dimethyl-1,4,2,3-diazadiborinane (10) as the kinetically controlled product.This is further substantiated by the reaction of the B2(NMe2)2Br2 with 9 which gives exclusively the corresponding 1,4,2,3-diazadiborinane 11.Diborane(4) dihalides B2(NMe2)2X2 (X = Cl, Br) react only in 1:1 ratio with tmp-BN-CMe3 (13) leading to 14a, b.However, both a 1:1 and 1:2 methoxyboration of 13 has been observed with B2(OMe)4 with formation of 15 and 16. - Key Words: Diborane(4), tetraamino-, derivatives / Diborane(4), tetrapiperidino / 1,2,3,6-Diazadiborinane derivatives / Haloboration / Methoxyboration