Organocatalytic Alkyne Isomerizations under Flow Conditions Using Heterogeneous Bifunctional Polystyrene Bearing Phosphine and Phenol Groups
作者:Andreas Kirschning、Patrick Toy、Sascha Ceylan、Henry Law
DOI:10.1055/s-0036-1588589
日期:——
polymer bearing phosphine and phenol groups was developed to catalyze the isomerization of electronically activated alkynes. This organocatalytic process provided the corresponding (E,E)-dienes and was shown to work under both batch and flow conditions. A heterogeneous bifunctional polymer bearing phosphine and phenol groups was developed to catalyze the isomerization of electronically activated alkynes
Regio- and Diastereoselective Construction of Spirocyclopenteneoxindoles through Phosphine-Catalyzed [3 + 2] Annulation of Methyleneindolinone with Alkynoate Derivatives
A phosphine-catalyzed [3 + 2] annulation of isatin-derived α,β-unsaturatedketones with alkynoates for the synthesis of cyclopentene spiro-oxindole skeletons has been developed. This reaction afforded the desired products in high to excellent yields (up to 99%) with high regioselectivity and moderate to high diastereoselectivities (up to 20:1). This strategy allows facile diastereoselective preparation