1.
Angew Chem Int Ed Engl
; 55(30): 8701-5, 2016 07 18.
Artículo
en Inglés
| MEDLINE
| ID: mdl-27385632
RESUMEN
The treatment of silylethynyloxyarenes with allylic pivalates in the presence of a palladium catalyst led to efficient C-H bond cleavage in both substrates and a novel annulation reaction to give 2,3-bismethylenechromanes. When ortho-allylated silylethynyloxybenzenes were used as the substrates, the same products were obtained. This result shows that site-selective intramolecular hydrovinylation is involved in the annulation reaction. The synthetic utility of the products was demonstrated by the construction of condensed polycycles.