Convergent synthesis and characterization of organotin dendrimers Sn{(CH2)nSn[(CH2)4SnPh3]3}4 (n=3, 4)

被引:7
|
作者
Schumann, Herbert [1 ]
Aksu, Yilmaz [1 ]
Wassermann, Birgit C. [1 ]
机构
[1] Tech Univ Berlin, Inst Chem, D-10623 Berlin, Germany
关键词
D O I
10.1021/om0602005
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The reaction of the omega-haloalkyltin trihalides Br(CH2)(3)SnBr3 and Br(CH2)(4)SnBr3 with 3 equiv of but-3-enylmagnesium bromide yielded Br(CH2)(3)Sn(CH2CH2CH=CH2)(3) ( 3) and Br(CH2)(4)Sn(CH2CH2CH=CH2) (3) (4). Both dendritic branches can be converted into their corresponding Grignard reagents, whose consequent treatment with 0.25 M amounts of SnCl4 resulted in the formation of the dendrimers Sn[(CH2)(3)Sn(CH2CH2CH=CH2)(3)](4) (5) and Sn[(CH2)(4)Sn(CH2CH2CH=CH2)(3)](4) ( 6), respectively. The subsequent hydrostannation of 5 and 6 delivered Sn {(CH2)(3)Sn[(CH2)(4)SnPh3](3)}(4) ( 7) and Sn {(CH2)(4)Sn[(CH2)(4)SnPh3](3)}(4) ( 8) as dendrimers of the second generation. All compounds were characterized by elemental analysis, H-1, C-13, and Sn-119 NMR spectroscopy, and MALDI-TOF mass spectrometry.
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收藏
页码:3428 / 3434
页数:7
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