axial face on sequential reaction of 1 with alkyllithiums, copper iodide-dimethyl sulfide and allyl bromides and (ii) from the equatorlal face on reaction with allylstannanes or -silanes in the presence of a Lewis acid. The synthesis of 1-selenocyclohexane has been achieved from 1 via the “carbanionic route” or with tin hydride through a “radical route”. The former reaction leads selectively to the
Conversion of aldehydes and ketones into selenoacetals: use of tris(phenylseleno)borane and tris(methylseleno)borane
作者:Derrick L. J. Clive、Steven M. Menchen
DOI:10.1021/jo01338a013
日期:1979.11
Cleavage of the CSe bond of cyclic selenoacetals derived from 4-t-butyl cyclohexanone with butyllithiums and tin and silyl hydrides
作者:Alain Krief、Elie Badaoui、Willy Dumont
DOI:10.1016/s0040-4039(00)61373-4
日期:1993.1
Selenoacetals derived from 1,3-propanediselenol and 1,2-ethanediselenol are much less Hone to be cleaved by butyllithiums than their open chain analogues. The stereochemistry of the products resulting from these reactions as well as from the cleavage of the C-Se bond under radical conditions is disclosed.