Ni-catalyzed Si-B addition to 1,3-dienes: disproportionation in lieu of silaboration.
[reaction: see text] Upon attempted silaboration of acyclic 1- and 1,4-substituted 1,3-dienes, a new disproportionation reaction was discovered, yielding 1:1 mixtures of allylsilanes and dienylboranes. It was demonstrated that, as a key step in this new catalytic process, hydrogen is being transferred from one diene moiety to another.
Gerdin
Martin
M
Organic Chemistry, KTH School of Chemical Science and Engineering, Stockholm, Sweden.
Moberg
Christina
C