B-fluoroborazines. The ring size of the products is controlled by the steric requirement of the N-substituents. B-tri-t-butyl-N-tri-i-propylborazine (which behaves as a fluctional Dewarborazine in solution) quantitatively gives the corresponding diazadiboretidine upon heating to 200°C. B-di-t-butyl-N-bis(trimethylsilyl)diazadiboretidine is made from the B-tri-fluoro-N(trimethylsilyl)borazine and t-butyl-lithium
Ñ -Organyl-乙-叔丁基-环
硼氮烷[-Bt-BU-NR-] 3或diazadiboretidines [-Bt-BU-NR'-] 2选自
叔丁基锂的反应和相应的得到的乙-fluoroborazines。产品的环尺寸受N-取代基的空间要求控制。在加热到200℃时,B-三叔丁基-N-
三异丙基硼嗪(其在溶液中表现为去甲去甲
硼嗪)定量地给出相应的重氮二
硼丁啶。B-二叔丁基-N-双(三甲基甲
硅烷基)二氮杂二
硼丁烷是由B-三
氟-N(三甲基甲
硅烷基)
硼嗪和
叔丁基锂或通过t-bu(F)BN(Sime 3)2的热解。产物通过质谱和NMR(1 H,11 B,13 C,29 Si)光谱和元素分析进行表征。