Tandem Catalytic Triple-Bond Cleavage of Alkyne in Association with Aldehyde, Alkene, and Water
作者:Chul-Ho Jun、Kyung-Mi Cha、Eun-Ae Jo
DOI:10.1055/s-0029-1218000
日期:2009.11
In this tandem reaction the carbon-carbon triple bond of an alkyne is catalytically cleaved in association with aldehyde, alkene, and H2O under catalyst mixtures of Rh(I), 2-amino-3-picoline, primary amine, and acid. The reaction starts with chelation-assisted hydroacylation of the alkyne with an aldehyde. The retro-Mannich-type fragmentation of the resulting α,β-unsaturated ketimine by an amine and acid affords a ketimine and an aldimine, which is trapped by an alkene and give ketones after hydrolysis.
在这个串联反应中,炔烃的碳碳三键在铑(I)、2-氨基-3-吡啶、一级胺和酸的催化混合物的作用下,与醛、烯烃和水共同催化断裂。反应以炔烃与醛的螯合辅助羟基醇化开始。生成的α,β-不饱和酮亚胺经过胺和酸的逆曼尼希类裂解,产生酮亚胺和醛亚胺,后者被烯烃捕获,经过水解生成酮。