ISSN:
0009-2940
Keywords:
Boranes, amino(imino)-
;
Boranes, alkylidene(amino)-
;
Tantalum, alkylidene complexes
;
Azadiboracyclobutanes
;
[2 + 2] Cycloadditions
;
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Further Reactions of the Amino(imino)borane Me3Si(tBu)N*B*NtBu and the Alkylidene(amino)borane Me3Si(tBu)-N=B=CHtBuThe alkylidenetantalum complexes [tBuHC=TaCl3(THF)2] (1b), [PhHC=TaCl3(PMe3)2] (1c), and [tBuHC=Ta(CH2tBu)3] (1d) were treated with the amino(imino)borane Me3Si(t-Bu)N*B*NtBu (2d). From 1b and 2d, the alkylidene(amino)borane Me3Si(tBu)N=B=CHtBu (7) is formed by metathesis. The 1:2 reaction of 1c with 2d gives the azadiboracyclobutane [-N(tBu)-B(X)-CHPh-B(X)-] [6d, X=Me3Si(tBu)N]. The six-membered ring compound [-N(tBu)=BR-N(tBu)-SiMe2-CH2-TaR(CHtBu)-] (8, R=CH2tBu) is obtained from 1d and 2d; the product 8 crystallizes in the space group P 21/c. The borane 7 is attacked at the BC double bond by Et2NH, tBuCHO, and Me3SiN3 giving the diamino(neopentyl)borane 9 by protolysis, the oxaboracyclobutane 10 by [2 + 2] cycloaddition, and the azaboracyclopropane 11 by cycloaddition and elimination of N2, respectively.
Additional Material:
1 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/cber.19931260710
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