Organic Iron for the PdCl2/FeCl3-Cocatalyzed Coupling Cyclization of 2,3-Allenoates in the Presence of Allylic Bromides
作者:Bo Chen、Shengming Ma
DOI:10.1002/chem.201002553
日期:2011.1.17
Newcoupling: The interaction of ferric chloride with 2,3‐allenoates generates a 2‐(5H)‐furanonyl iron species, which was observed to readily undergo transmetalation with PdCl2 to result in coupling with allylic bromides (see scheme). Based on this reaction, an efficient method for the synthesis of β‐allyl polysubstituted butenolides from the easily available allylic bromides and 2,3‐allenoates has