Facile synthesis of 3,3-diallyl isoindolones via a indium-mediated double allylation of ortho-cyanobenzoates
作者:Sung Hwan Kim、Se Hee Kim、Ko Hoon Kim、Jae Nyoung Kim
DOI:10.1016/j.tetlet.2009.12.034
日期:2010.2
Various 3,3-diallyl isoindolones were synthesized via a indium-mediated Barbier type double allylation reaction of ortho-cyanobenzoates in good yields in short time. The reactivity of nitrile group toward allylindium is sufficient to form a cyclic compound when a suitable electrophilic center is present in the same molecule to trap the imine intermediate. (c) 2009 Elsevier Ltd. All rights reserved.
Zinc-Mediated Double Addition on Functionalized Nitriles
product was modulated by kinetic control, giving selectively hydroxyamides or cyclic carbamates. Allylzinc reagents were used to access highly functionalized tertiary carbinamine derivatives in high yields from cyanoesters and cyanocarbonates. While the monoaddition of organometallics on nitriles is generally observed, in this work the nucleophilic allylation occurs twice, due to an intermediate transfer