Synthesis of Pyrrolin-4-ones by Pt-Catalyzed Cycloisomerization in PEG under Microwaves
作者:Rosella Spina、Evelina Colacino、Bartolo Gabriele、Giuseppe Salerno、Jean Martinez、Frédéric Lamaty
DOI:10.1021/jo302474r
日期:2013.3.15
The unprecedented eco-friendly Pt-catalyzed 5-endo-dig cycloisomerization of readily available a-amino ynones is reported under microwave irradiation in PEG-3400 as reaction matrix. The corresponding pure pyrrolin-4-ones were obtained in excellent yields (80-98%) directly after a straightforward precipitation-filtration workup, thus avoiding any chromatographic purification. The catalytic system was recycled and the chiral purity of all the products was also investigated.