24355-86-0Relevant academic research and scientific papers
Stereoselective Addition of Phenols to Dimethyl Acetylenedicarboxylate adsorbed on Alumina
Kodomari, Mitsuo,Sakamoto, Takaaki,Yoshitomi, Suehiko
, p. 701 - 702 (2007/10/02)
Although phenols react with dimethyl acetylenedicarboxylate (DMAD) to give a mixture of both cis- and trans-addition products, the reaction with DMAD adsorbed on alumina gives cis-addition products stereoselectively.
Substituted 4H-1-Benzopyran-4-ones (Chromones): Synthesis via Palladium-catalysed Coupling of their Halogeno Derivatives with Alkenes
Davies, Stephen G.,Mobbs, Bryan E.,Goodwin, Christopher J.
, p. 2597 - 2604 (2007/10/02)
Activation of bromochromones has been achieved by Pd0 insertion into the carbon-halogen bond.The resultant species undergo coupling with alkenes leading to vinylated chromones.Vinylation occurs regiospecifically at the original site of bromination and therefore provides a method for the clean introduction of substituents into the chromone ring system.An anomalous reaction of a dibrominated chromone leading to a ring-opened product is described.
