Remarkable reversal of the regioselectivity in the palladium catalyzed hydrocarbonation reaction of allenes with methylmalononitrile
作者:Yoshinori Yamamoto、Mohammad Al-Masum、Naoya Fujiwara、Naoki Asao
DOI:10.1016/0040-4039(95)00403-y
日期:1995.4
The palladium catalyzed addition of methylmalononitrile 4a to arylallenes 3 affords the internal adducts 5 and 6 either predominantly or exclusively when an electron-withdrawing group is present at the para-position, whereas it gives the terminal adduct 7 exclusively when an electron-donating group is present at the para-position.