A convenient method for the synthesis of Δ1,6-bicyclo[4.n.0]alken-2-ones
作者:Norihiko Watanabe、Keiji Tanino、Isao Kuwajima
DOI:10.1016/s0040-4039(99)01723-2
日期:1999.11
A convenient annulation method for the synthesis of bicyclic enones from cycloalkanones was developed. In the presence of a Pd(0) catalyst, enol triflates derived from ethyl 2-oxocycloalkanecarboxylates were treated with 3-(ethoxycarbonyl)propylzinc iodide to afford the corresponding diesters via a cross-coupling reaction. The diesters were easily transformed into Δ1,6-bicyclo[4.n.0]alken-2-ones through
Dienolates Derived from Unsaturated Carboxylic Acids in Synthesis. Four-Carbon Annellation of Cycloalkanones; Improved Synthesis of Bicyclo[n.4.0]alken-2-ones