A novel highly stereoselective spiro-cyclopropanation reaction from oxoallylsilanes is described. Oxoallylsilanes are readily obtained by silylcupration of allene followed by conjugate addition to enones. The former oxoallylsilanes undergo a tandem cyclization-cyclopropanation reaction when treated with CH2I2/Me3Al, leading to hydroxylated polycyclic systems bearing the spiro-cyclopropane moiety. The scope of the process is studied, and a feasible pathway is discussed.
作者:Asunción Barbero、Pilar Castreño、Francisco J. Pulido
DOI:10.1021/ja051967b
日期:2005.6.1
A novel highly stereoselective spiro-cyclopropanation reaction from oxoallylsilanes is described. Oxoallylsilanes are readily obtained by silylcupration of allene followed by conjugate addition to enones. The former oxoallylsilanes undergo a tandem cyclization-cyclopropanation reaction when treated with CH2I2/Me3Al, leading to hydroxylated polycyclic systems bearing the spiro-cyclopropane moiety. The scope of the process is studied, and a feasible pathway is discussed.
Barbero, Asuncion; Castreno, Pilar; Pulido, Francisco J., ARKIVOC, 2010, vol. 2010, # 3, p. 274 - 287
作者:Barbero, Asuncion、Castreno, Pilar、Pulido, Francisco J.、Val, Patricia、Gonzalez-Ortega, Alfonso、Sanudo, M. Carmen