Synthesis of hydrosilanes: Via Lewis-base-catalysed reduction of alkoxy silanes with NaBH4
Hydrosilanes were synthesized by reduction of alkoxy silanes with BH3 in the presence of hexamethylphosphoric triamide (HMPA) as a Lewis-base catalyst. The reaction was also achieved using an inexpensive and easily handled hydride source NaBH4, which reacted with EtBr as a sacrificial reagent to form BH3in situ.
(Chemical Equation Presented) The trans-selective hydrosilylation of ynones (1) yields ss-silylated enones (2) that undergo a benzylic 1,4-rearrangement/cyclization reaction in the presence of base, yielding 2,5-dihydro-1,2-oxasiloles (3).
Trost, Barry M.,Bertogg, Andreas
supporting information; experimental part
p. 511 - 513
(2009/07/10)
Peculiarities in the cleavage by methyllithium of unsymmetrical disilanes
The title reactions did not produce the more stable silyl anions from the disilanes studied, they either occurred by attack at the more electrophilic silicon atom, or led to unexpected products.
Hevesi,Dehon
p. 8031 - 8032
(2007/10/02)
More Articles about upstream products of 13888-77-2