Palladium-catalysed borylsilylation and borylstannylative dimerization of 1,2-dienes
作者:Shun-ya Onozawa、Yasuo Hatanaka、Masato Tanaka
DOI:10.1039/a905127i
日期:——
A borylsilane regioselectively adds to 1,2-dienes in the presence of palladium complexes to afford high yields of alkenylboranes having allylsilane moieties, whereas a borylstannane gives a 1 : 2 telomer with 3-methylbuta-1,2-diene due to borylstannylative dimerization.
)pinacolborane to allenes in good yields. In the silaboration of terminalallenes having electron-donating substituents such as alkyl and methoxy groups, the SiB bond added to the internal CC bond with regioselective BC and SiC bond formation at the central and substituted carbon atoms of the allene, respectively. In contrast, the silylborane preferably added to the terminal CC bond with exclusive