Phenyl trimethyl ammonium tribromide mediated robust one-pot synthesis of spiro-oxacycles – an economic route – stereoselective synthesis of oxaspirohexacyclodieneones
作者:Debayan Sarkar、Manoj Kumar Ghosh、Nilendri Rout
DOI:10.1039/c6ob01116k
日期:——
This paper entails the first recognition of PhenylTrimethylAmmonium Tribromide (PTAB) as an effective reagent for spiro-cyclizations proceeding via oxidative dearomatization. The experiment exhibits economical, metal and ligand free one-pot accomplishment of these significant transformations. The described protocol presents the first generalised methodology of spiro-oxacycle synthesis which can be