14684-18-5Relevant academic research and scientific papers
Synthesis of B-trisubstituted borazines via the rhodium-catalyzed hydroboration of alkenes with N,N′,N″-trimethyl or N,N′,N″-triethylborazine
Yamamoto, Yasunori,Miyamoto, Kazuo,Umeda, Junko,Nakatani, Yasutaka,Yamamoto, Tetsuya,Miyaura, Norio
, p. 4909 - 4917 (2007/10/03)
Hydroboration of terminal and internal alkenes with N,N′,N″-trimethyl- and N,N′,N″-triethylborazine was carried out at 50 °C in the presence of a rhodium(I) catalyst. Addition of dppb or DPEphos (1 equiv.) to RhH(CO)(PPh3)3 gave the
Synthesis of a new boron carbonitride with a B4C-like structure from the thermolysis of N-alkylated borazines
Brydson, Rik,Daniels, Howard,Fox, Mark A.,Greatrex, Robert,Workman, Christopher
, p. 718 - 719 (2007/10/03)
Thermolysis of N-trialkyl borazines at 500°C produces homogeneous, amorphous boron carbonitride phases, whose compositions are dependent upon the borazine substituent, and whose structures are similar to that of icosahedral boron carbide, B4C.
Convenient direct syntheses of novel fused-ring CB4N5 systems by nitrile hydroboration
Coult, Robert,Fox, Mark A.,Rand, Brian,Wade, Kenneth,Westwood, Aidan V. K.
, p. 3411 - 3413 (2007/10/03)
Reactions between B2H6 or BH3·thf (thf = tetrahydrofuran) and nitriles RC≡N (R = Me, Et, But or CH2F), previously known to generate borazines (RCH2NBH)3 have been found to generate also 25-37% yields of novel carboraza bicyclic systems related to dihydronaphthalene, H3B4N5(RCH2)4CHR, thus affording for the first time a direct route from commercially available acyclic reagents into mixed carbon-boron-nitrogen heterocyclic chemistry.
Derivatives of Aza-nido-tetraborane and Diaza-arachno-pentaborane from Tri-tert-butylazadiboriridine
Mueller, Matthias,Wagner, Trixie,Englert, Ulli,Paetzold, Peter
, p. 1 - 10 (2007/10/02)
The Lewis acids RBH2 are added to the basis B-B bond of tri-tert-butylazadiboriridine, NB2tBu3 (1a), to give 5-alkyl-1,2,3-tri-tert-butyl-1-aza-nido-tetraboranes of type 3 (two endo-H atoms at B5) or type 4 (one H atom in a B2-B5 bridging position, one exo-H atom at B5), either as a mixture of 3 and 4 (3, 4b-d: R = Me, tBu, CMe2iPr) or with the isomer 4 in high excess (4e, f: R = Ph, sBu).The reaction of dialkylboranes R2BH with 1a yields 5,5-dialkyl-1,2,3-tri-tert-butyl-1-aza-nido-tetraboranes of type 4 (one H atom in a B2-B5 bridging position; 4g, h: R2 = Et2, cycloocta-1,5-diyl).In boiling THF, trialkylboranes BR3 transform 1a into NB2tBu2R which, expectedly, dimerizes spontaneously to give a dialkyl-tetra-tert-butyl-2,5-diaza-nido-hexaborane of type 2 (2a, b: R = Me, Et).The products of the addition of aminoboranes H2B=NRR' to 1a are identified as alkyl derivatives of 2,5-diaza-arachno-pentaborane, N2B3H2tBu3RR' (5a-d, R/R' = H/Pr, H/tBu, Me/Me, Et/Et).The aminoborane H2B=NiPr2 with a sterically more demanding amino group hydroborates the B-B bond of 1a to give the acyclic product iPr2N=BH-B(tBu)-N(tBu)=B(tBu)H (6).In contrast to the B atoms, the N atoms in the electron-deficient cluster skeletons of 2-5 need not take part in (3c, 2e) bonds of the ? type.The molecular structures of 4c, 5d, and 6 are confirmed by X-ray structural analyses. - Key Words: 1-Aza-nido-tetraboranes / 2,5-Diaza-arachno-pentaboranes / 2,5-Diaza-nido-hexaboranes / Borylamine
