Functionalized Carbosilane Dendritic Species as Soluble Supports in Organic Synthesis
作者:Neldes J. Hovestad、Allan Ford、Johann T. B. H. Jastrzebski、Gerard van Koten
DOI:10.1021/jo991726k
日期:2000.10.1
the use of reactive organometallic reagents, has been developed for the use of carbosilane dendrimers as soluble supports in organic synthesis. Hydroxy-functionalized dendritic carbosilanes Si[CH2CH2CH2SiMe2(C6H4CH(R)OH)]4 (G0-OH, R = H or (S)-Me) and Si[CH2CH2CH2Si[CH2CH2CH2SiMe2(C6H4CH(R)OH)]3]4 (G1-OH, R = H or (S)-Me) were prepared and subsequently converted into the esters Si[CH2CH2CH2SiMe2(C6H4CH(R)OC(O)CH2Ph)]4
已经开发出一种与使用反应性有机金属试剂兼容的新方法,以将碳硅烷树状大分子用作有机合成中的可溶性载体。羟基官能化的树枝状碳硅烷Si [CH2CH2CH2SiMe2(C6H4CH(R)OH)] 4(G0-OH,R = H或(S)-Me)和Si [CH2CH2CH2Si [CH2CH2CH2SiMe2(C6H4CH(R)OH)] 3] 4(制备G 1 -OH,R = H或(S)-Me),然后将其转化成酯Si [CH 2 CH 2 CH 2 SiMe 2(C 6 H 4 CH(R)OC(O)CH 2 Ph)] 4(R = H或(S)-Me)和Si [CH2CH2CH2Si [CH2CH2CH2SiMe2(C6H4CH(R)OC(O)CH2C6H4 R')] 3] 4(R = H和R'= H或R =(S)-Me和R'= H或R = H和R '= Br)。例如,后一种化合物在铃木条件下被官能化。从树状