Lewis Base Promoted Intramolecular Acylcyanation of α-Substituted Activated Alkenes: Construction of Ketones Bearing β-Quaternary Carbon Centers
摘要:
A novel phosphine-promoted intramolecular acylcyanation of alpha-substituted activated alkenes has been developed, which provides a unique access to densely functionalized acyclic ketones bearing beta-quaternary carbon centers with a remarkable feature that both alpha- and beta-positions of activated alkene are functionalized.
A novel phosphine-promoted intramolecular acylcyanation of alpha-substituted activated alkenes has been developed, which provides a unique access to densely functionalized acyclic ketones bearing beta-quaternary carbon centers with a remarkable feature that both alpha- and beta-positions of activated alkene are functionalized.
DABCO-Mediated Synthesis and Biological Activity of Cyanohydrin Esters
作者:H. M. R. Hoffmann、Z. M. Ismail、Reiner Hollweg、Abdul R. Zein
DOI:10.1246/bcsj.63.1807
日期:1990.6
Cyanohydrinesters 1–31 have been prepared from α-ketonitriles and aldehydes using DABCO (1,4-diazabicyclo[2.2.2] octane) as nucleophilic acylation catalyst. The modified piperonal 8 was found to inhibit the formation of thromboxane synthetase.