Titanocene(III) mediated radical cyclizations of epoxides for the synthesis of medium-sized cyclic ethers
作者:Samir Kumar Mandal、Subhas Chandra Roy
DOI:10.1016/j.tet.2007.08.072
日期:2007.11
Titanocene(III) chloride (Cp2TiCl) mediated 7-exo and 8-endo radical cyclizations of epoxides towards the synthesis of 7- and 8-membered cyclic ethers have been described. Titanocene(III) chloride was prepared in situ from commercially available titanocene dichloride (Cp2TiCl2) and activated zinc dust in THF.
Titanocene(III) mediated 8-endo radical cyclizations for the synthesis of eight-membered cyclic ethers
作者:Samir Kumar Mandal、Subhas Chandra Roy
DOI:10.1016/j.tetlet.2005.12.131
日期:2006.3
Titanocene(III) chloride (Cp2TiCl) mediated 8-endo radical cyclizations towards the synthesis of eight-membered cyclic ethers have been described. Titanocene(III) chloride was prepared in situ from commercially available titanocene dichloride (Cp2TiCl2) and activated zinc dust in THF.
Thiophenol-mediated intramolecular radical cyclization: an efficient method for the synthesis of benzoxocine derivatives
作者:Krishna C. Majumdar、K. Ray、P. Debnath、P.K. Maji、N. Kundu
DOI:10.1016/j.tetlet.2008.07.030
日期:2008.9
A new, efficient, high yielding method for the synthesis of benzoxocine derivatives has been developed via a thiophenol-mediated intramolecular 8-endo radicalcyclization. This method allowed the synthesis of the backbone of several sesquiterpenes.