21022-74-2Relevant articles and documents
Zirconia-modified superacid UDCaT-5: An efficient and versatile catalyst for alkylation reactions under solvent-free conditions
Yadav, Ganapati D.,Pathre, Ganesh S.
, p. 2684 - 2691 (2008/12/22)
UDCaT-5, a modified version of zirconia, efficiently catalyzes alkylation of phenols with alcohols under environmentally safe, heterogeneous reaction conditions with high selectivity and in excellent yields. The high content present in UDCaT-5 with preservation of tetragonal phase of zirconia was responsible for the superactivity. Several phenolic compounds carrying either electron-sulfer releasing or electron-withdrawing substituents in the ortho, meta, and para positions afforded high yields of the products. Copyright Taylor & Francis Group, LLC.
AN APPROACH TO TAXODIONE INVOLVING BIOMIMETIC POLYENE CYCLIZATION METHODOLOGY
Johnson, William S.,Shenvi, Ashok B.,Boots, Sharon G.
, p. 1397 - 1404 (2007/10/02)
A novel synthesis of 11,12-dimethoxyabieta-8,11,13-triene (4), involving the biomimetic cyclization of allylic alcohol 5 is described.This represents a formal total synthesis of taxodione (1), a tumor-inhibitory diterpenoid quinone methide.Treatment of th