The 2-halo-2,3-dihydro-1H-1,3,2-diazaboroles
(1a′: R = tBu, X = Br; 1b: R = 2,6-Me2C6H3; X = I) were converted into the 2-amino-2,3-dihydro-1H-1,3,2- diazaboroles
(2a: R = tBu; 2b: 2,6-Me2C6H3) by treatment with dry gaseous ammonia. Similarly reaction of 1a′ with 2,6-dimethylaniline or tBuNH2 afforded the corresponding derivates
(3; R1 = 2,6-Me2C6H3; 4; R1 = tBu). The treatment of 1a′ with the ethylene diamine adduct of lithium acetylide led to the formation of
(5). Lithiation of 2 a and subsequent silylation gave 6 (R1 = SiMe3), which was transformed to the diborolylamine
(7) upon exposure to 1a′. Borolylketimine
(8 ) and borolylcarbodiimide
(9) resulted from 1a′ and Ph2C=NSiMe3 or Me3SiN=C=NSiMe3, respectively. All the new compounds were characterized by elemental analyses as well as spectroscopic data (IR, 1H, 11B, 13C NMR, MS). Heterocycle 5 was also subjected to an X-ray diffraction analysis.
2-卤代-2,3-二氢-1H-1,3,2-二氮
硼烷(1a′: R = tBu, X = Br; 1b: R = 2,6-Me
2C
6H
3; X = I)经干燥
氨气处理转化为2-
氨基-2,3-二氢-1H-1,3,2-二氮
硼烷(2a: R = tBu; 2b: 2,6-Me
2C
6H
3)。类似地,1a′与
2,6-二甲基苯胺或tBuNH
2反应生成相应的衍
生物(3; R
1 = 2,6-Me
2C
6H
3; 4; R
1 = tBu)。1a′与
乙炔二胺配合物反应形成了(5)。2a的
锂化及随后的
硅烷化反应得到6(R
1 = SiMe
3),暴露于1a′后转化为二
硼杂
氨基(7)。Borolylketimine(8)和borolylcarbodiimide(9)分别由1a′和Ph
2C=NSiMe
3或Me
3SiN=C=NSiMe
3形成。所有新化合物均通过元素分析和光谱数据(IR,
1H,
11B,
13C NMR,MS)进行表征。
杂环化合物5还进行了X射线衍射分析。