We have developed Zn-catalyzed asymmetric allylation of hydrazono esters with allylboronates. The reactions proceeded smoothly in high yields and high stereoselectivities. Remarkably, formal <
IMG SRC="/images/gifchars/alpha.gif" BORDER=0>-addition occurred for
![](/images/gifchars/alpha.gif)
-substituted allylboronates exclusively, and excellent stereoselectivities were observed. This is the first example of
catalytic regio- and stereoselective allylations with formal
![](/images/gifchars/alpha.gif)
-addition. In addition, the reaction proceeded in aqueous media, and the use of water is essential. Zn(OH)
2 might be a catalyst in this asymmetric allylation, and the catalytic activity of Zn(OH)
2 was confirmed. This is also the first case of chiral metal hydroxide-catalyzed asymmetric reactions.