Metallic base-induced and Lewis acid-catalyzed nitrone cycloadditions to allyl alcohol dipolarophiles. Highly effective regio- and stereocontrol
作者:Shuji Kanemasa、Takashi Tsuruoka、Eiji Wada
DOI:10.1016/s0040-4039(00)60064-3
日期:1993.1
pretreatment of the dipolarophiles with an organometalliccompound such as ethylmagnesium bromide or diethylzinc, or 2) in the presence of a Lewis acid such as magnesiumbromide or zinc bromide. These cycloadditions are highly regio- and stereoselective, both selectivities depending upon the kind of metals included in the organometallics or Lewis acid employed. These reactions offer the first example of regio-