Sequential Addition Reactions of Two Molecules of Grignard Reagents to Thioformamides
作者:Toshiaki Murai、Kazuki Ui、Narengerile
DOI:10.1021/jo900915n
日期:2009.8.7
Sequential additionreactions of two molecules of Grignardreagents to thioformamides were found to yield tertiary amines in an efficient manner. The addition of two different Grignardreagents can be accomplished by using one equivalent of arylmagnesium reagent in the first step. In the second step, a variety of reagents such as alkyl, alkenyl, aryl, and alkynyl reagents were used to afford the corresponding
A copper-catalyzed ring-opening hydroamination of methylenecyclopropanes with polymethylhydrosiloxane and O-benzoylhydroxylamines has been developed. The cyclopropane C–C bond cleavage occurs selectively at the more congested proximal position, and the corresponding homoallylamines are obtained in good to excellent yields. The umpolung electrophilic amination strategy with the hydroxylamine derivatives